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研究PrintFormat（）并应用现成的示例·进阶篇

第 2/3 篇

本章目录

用 PrintFormat 把浮点打印成不同进制与精度
PrintFormat 的星号字段与浮点格式实战
PrintFormat 多进制与浮点格式混排实测
用 PrintFormat 对齐报价与极值输出
PrintFormat 里 c/C 与 d/i 的格式差异
把账户属性整齐打进日志的写法

「用 PrintFormat 把浮点打印成不同进制与精度」

在 MT5 脚本调试里，PrintFormat 比 Print 更可控，能用类 C 的格式化串把同一笔数据按多种表示法输出，方便比对点位精度或极值溢出。下面这段演示了 e/E 科学计数与 a/A 十六进制浮点的差异：value1=255 在 e 格式下是 2.550000e+02，而 a 格式直接给出 0x1.fe00000000000p+7 的底层位模式。另一组调用把 Point()（默认品种下常见为 0.00001）和 DBL_MAX 打出来：%-22f 给到 0.000010，%-#22g 则是 1.79769e+308，能直观看到双精度上限量级。把 EMPTY_VALUE 套上 %-#22.5f 与 %-#22G，输出 0.00001 与 1.79769E+308，说明空值在 double 层本质仍是 DBL_MAX。开 MT5 新建脚本粘入下方代码，跑完看日志：若你经纪商黄金点差是 0.01，Point() 会变成 0.01，浮点尾数位宽不变但小数位缩短，这类细节只有实盘品种能暴露。外汇与贵金属波动剧烈，点值精度误差可能在剥头皮策略里放大风险，建议先回测再上实盘。

MQL5 / C++

class="type">class="kw">string header=""; class=class="str">"cmt">// Data header
class="type">class="kw">double value1=class="num">0; class=class="str">"cmt">// First value
class="type">class="kw">double value2=class="num">0; class=class="str">"cmt">// Second value

class=class="str">"cmt">//--- The first line with a header in a class="num">16-character field and data in class="num">22-character fields
class=class="str">"cmt">//--- The header and data of all fields are pressed to the left edge.
class=class="str">"cmt">//--- Data values of the second field are displayed together with the &class="macro">#x27;e&class="macro">#x27; format
class=class="str">"cmt">//--- Data values of the third field are displayed together with the &class="macro">#x27;E&class="macro">#x27; format
header="Header1";
value1=class="num">255;
value2=class="num">1024;
PrintFormat("%-16s(e) %-22e(E) %-class="macro">#22E",header,(class="type">class="kw">double)value1,(class="type">class="kw">double)value2);

class=class="str">"cmt">//--- The second line with a header in a class="num">16-character field and data in class="num">22-character fields
class=class="str">"cmt">//--- The header and data of all fields are pressed to the left edge.
class=class="str">"cmt">//--- Data values of the second field are displayed together with the &class="macro">#x27;a&class="macro">#x27; format
class=class="str">"cmt">//--- Data values of the third field are displayed together with the &class="macro">#x27;A&class="macro">#x27; format
header="Header2";
value1=class="num">255;
value2=class="num">1024;
PrintFormat("%-16s(a) %-class="macro">#22a(A) %-class="macro">#22A",header,(class="type">class="kw">double)value1,(class="type">class="kw">double)value2);

class=class="str">"cmt">/* Sample output:
    Header1(e) class="num">2.550000e+02          (E) class="num">1.024000E+03          
    Header2(a) 0x1.fe00000000000p+class="num">7 (A) 0X1.0000000000000P+class="num">10
 */
}
class="type">void OnStart()
  {
class=class="str">"cmt">//--- Declare the variables to be printed
  class="type">class="kw">string  header=""; class=class="str">"cmt">// Data header
  class="type">class="kw">double  value1=class="num">0;  class=class="str">"cmt">// First value
  class="type">class="kw">double  value2=class="num">0;  class=class="str">"cmt">// Second value

class=class="str">"cmt">//--- The first line with a header in a class="num">16-character field and data in class="num">22-character fields
class=class="str">"cmt">//--- The header and data of all fields are pressed to the left edge.
class=class="str">"cmt">//--- Data values of the second field are displayed together with the &class="macro">#x27;f&class="macro">#x27; format with class="kw">default precision
class=class="str">"cmt">//--- Data values of the third field are displayed together with the &class="macro">#x27;g&class="macro">#x27; format
  header="Header1";
  value1=Point();
  value2=DBL_MAX;
  PrintFormat("%-16s(f) %-22f(g) %-class="macro">#22g",header,(class="type">class="kw">double)value1,(class="type">class="kw">double)value2);

class=class="str">"cmt">//--- The second line with a header in a class="num">16-character field and data in class="num">22-character fields
class=class="str">"cmt">//--- The header and data of all fields are pressed to the left edge.
class=class="str">"cmt">//--- Data values of the second field are displayed together with the &class="macro">#x27;f&class="macro">#x27; format with class="num">5-character precision
class=class="str">"cmt">//--- Data values of the third field are displayed together with the &class="macro">#x27;G&class="macro">#x27; format
  header="Header2";
  value1=Point();
  value2=EMPTY_VALUE;
  PrintFormat("%-16s(f) %-#class="num">22.5f(G) %-class="macro">#22G",header,(class="type">class="kw">double)value1,(class="type">class="kw">double)value2);

  class=class="str">"cmt">/* Sample output:
    Header1(f) class="num">0.000010             (g) class="num">1.79769e+308         
    Header2(f) class="num">0.00001              (G) class="num">1.79769E+308         
  */
  }
class="type">void OnStart()
  {
class=class="str">"cmt">//--- Declare the variables to be printed
  class="type">class="kw">string  header=""; class=class="str">"cmt">// Data header
  class="type">class="kw">double  value1=class="num">0;  class=class="str">"cmt">// First value

◍ PrintFormat 的星号字段与浮点格式实战

在 MT5 的 PrintFormat 里，用 *- 这类星号宽度占位符可以把字段宽度推迟到参数里传，而不是写死在格式串中。上面第一段代码把表头塞进 16 字符左对齐域，两个数据各占 22 字符左对齐域，第二域用 %f 默认精度、第三域用 %g 科学计数。跑出来的样例里，Point() 在多数外汇品种下输出 0.00001，DBL_MAX 走 %g 显示成 1.79769e+308；把格式换成 %G 后同一数变成 1.79769E+308，仅大小写与指数标记差异。第二段改用十六进制浮点：%a 把 Point() 打成 0x1.4f8b588e368f1p-17，%A 把 DBL_MAX 打成 0X1.FFFFFFFFFFFFFP+1023。限定 .5a 后尾数截断到 5 位十六进制即 0x1.4f8b6p-17，EMPTY_VALUE 在 %A 下显示为 0X2.0000000P+1023。别把正态当圣经：这些输出依赖当前品种 Point 精度与双精度极值，换贵金属点位或 ECn 账户可能末位不同，开 MT5 切品种复跑即可验证。

MQL5 / C++

class="type">class="kw">double value2=class="num">0; class=class="str">"cmt">// Second value

class=class="str">"cmt">//--- The first line with a header in a *-character field(class="num">16) and data in *-character fields(class="num">22)
class=class="str">"cmt">//--- The header and data of all fields are pressed to the left edge.
class=class="str">"cmt">//--- Data values of the second field are displayed together with the &class="macro">#x27;f&class="macro">#x27; format with class="kw">default precision
class=class="str">"cmt">//--- Data values of the third field are displayed together with the &class="macro">#x27;g&class="macro">#x27; format
  header="Header1";
  value1=Point();
  value2=DBL_MAX;
  PrintFormat("%-*s(f) %-*f(g) %-#*g",class="num">16,header,class="num">22,(class="type">class="kw">double)value1,class="num">22,(class="type">class="kw">double)value2);

class=class="str">"cmt">//--- The second line with a header in a *-character field(class="num">16) and data in *-character fields(class="num">22)
class=class="str">"cmt">//--- The header and data of all fields are pressed to the left edge.
class=class="str">"cmt">//--- Data values of the second field are displayed together with the &class="macro">#x27;f&class="macro">#x27; format with class="num">5-character precision
class=class="str">"cmt">//--- Data values of the third field are displayed together with the &class="macro">#x27;G&class="macro">#x27; format
  header="Header2";
  value1=Point();
  value2=EMPTY_VALUE;
  PrintFormat("%-*s(f) %-#*.5f(G) %-#*G",class="num">16,header,class="num">22,(class="type">class="kw">double)value1,class="num">22,(class="type">class="kw">double)value2);

  class=class="str">"cmt">/* Sample output:
      Header1(f) class="num">0.000010                   (g) class="num">1.79769e+308                
      Header2(f) class="num">0.00001                     (G) class="num">1.79769E+308                
   */
}
class="type">void OnStart()
  {
class=class="str">"cmt">//--- Declare the variables to be printed
  class="type">class="kw">string  header=""; class=class="str">"cmt">// Data header
  class="type">class="kw">double  value1=class="num">0;  class=class="str">"cmt">// First value
  class="type">class="kw">double  value2=class="num">0;  class=class="str">"cmt">// Second value

class=class="str">"cmt">//--- The first line with a header in a class="num">16-character field and data in class="num">22-character fields
class=class="str">"cmt">//--- The header and data of all fields are pressed to the left edge.
class=class="str">"cmt">//--- Data values of the second field are displayed together with the &class="macro">#x27;a&class="macro">#x27; format with class="kw">default precision
class=class="str">"cmt">//--- Data values of the third field are displayed together with the &class="macro">#x27;A&class="macro">#x27; format with class="kw">default precision
  header="Header1";
  value1=Point();
  value2=DBL_MAX;
  PrintFormat("%-16s(a) %-22a(A) %-class="macro">#22A",header,(class="type">class="kw">double)value1,(class="type">class="kw">double)value2);

class=class="str">"cmt">//--- The second line with a header in a class="num">16-character field and data in class="num">22-character fields
class=class="str">"cmt">//--- The header and data of all fields are pressed to the left edge.
class=class="str">"cmt">//--- Data values of the second field are displayed together with the &class="macro">#x27;a&class="macro">#x27; format with class="num">5-character precision
class=class="str">"cmt">//--- Data values of the third field are displayed together with the &class="macro">#x27;A&class="macro">#x27; format with class="num">7-character precision
  header="Header2";
  value1=Point();
  value2=EMPTY_VALUE;
  PrintFormat("%-16s(a) %-#class="num">22.5a(A) %-#class="num">22.7A",header,(class="type">class="kw">double)value1,(class="type">class="kw">double)value2);

  class=class="str">"cmt">/* Sample output:
      Header1(a) 0x1.4f8b588e368f1p-class="num">17 (A ) 0X1.FFFFFFFFFFFFFP+class="num">1023
      Header2(a) 0x1.4f8b6p-class="num">17          (A) 0X2.0000000P+class="num">1023      
   */
}
class="type">void OnStart()
  {
class=class="str">"cmt">//--- Declare the variables to be printed
  class="type">class="kw">string  header=""; class=class="str">"cmt">// Data header
  class="type">class="kw">double  value1=class="num">0;  class=class="str">"cmt">// First value
  class="type">class="kw">double  value2=class="num">0;  class=class="str">"cmt">// Second value

PrintFormat 多进制与浮点格式混排实测

在 MT5 的 EA 或脚本里，PrintFormat 能像 C 语言 printf 那样用格式符把同一条日志压成对齐的表格。上面这段把 INT_MAX（2147483647）分别用十进制、八进制、十六进制小写和大写打印，终端里会看到 Header1 行第三列输出 02147483647，Header3 行第二列输出 0xffc00000，字段宽度锁死在 16 和 22 字符，左对齐靠 %- 控制。浮点侧换 DBL_MAX 进场，%e 与 %E 决定科学计数法的大小写，%f 则走定点小数。把 value1、value2 改成 SymbolInfoDouble(Symbol(), SYMBOL_ASK) 就能直接把当前品种卖价按 4 位和 11 位精度打出来，EURUSD 这类小数位多的报价差异一眼可辨。外汇与贵金属报价跳动快、点差随机，用这种格式做本地日志比对时，记得多跑几根 Bar 看精度截断是否影响你的判断。开 MT5 新建脚本粘入下方代码，改 Symbol 就能验证你经纪商的实际输出。

MQL5 / C++

class="type">class="kw">double value2=class="num">0; class=class="str">"cmt">// Second value

class=class="str">"cmt">//--- The first line with a header in a class="num">16-character field and data in class="num">22-character fields
class=class="str">"cmt">//--- The header and data of all fields are pressed to the left edge.
class=class="str">"cmt">//--- Data values of the second field are displayed together with the &class="macro">#x27;d&class="macro">#x27; format with class="num">4-character precision
class=class="str">"cmt">//--- Data values of the third field are displayed together with the &class="macro">#x27;i&class="macro">#x27; format with class="num">11-character precision
  header="Header1";
  value1=INT_MAX;
  value2=INT_MAX;
  PrintFormat("%-16s(d) %-class="num">22.4d(i) %-#class="num">22.11i",header,(class="type">int)value1,(class="type">int)value2);

class=class="str">"cmt">//--- The second line with a header in a class="num">16-character field and data in class="num">22-character fields
class=class="str">"cmt">//--- The header and data of all fields are pressed to the left edge.
class=class="str">"cmt">//--- Data values of the second field are displayed together with the &class="macro">#x27;u&class="macro">#x27; format with class="num">4-character precision
class=class="str">"cmt">//--- Data values of the third field are displayed together with the &class="macro">#x27;o&class="macro">#x27; format with class="num">11-character precision
  header="Header2";
  value1=INT_MAX;
  value2=INT_MAX;
  PrintFormat("%-16s(u) %-#class="num">22.4u(o) %-#class="num">22.11o",header,(class="type">class="kw">double)value1,(class="type">class="kw">double)value2);

class=class="str">"cmt">//--- The third line with a header in a class="num">16-character field and data in class="num">22-character fields
class=class="str">"cmt">//--- The header and data of all fields are pressed to the left edge.
class=class="str">"cmt">//--- Data values of the second field are displayed together with the &class="macro">#x27;x&class="macro">#x27; format with class="num">4-character precision
class=class="str">"cmt">//--- Data values of the third field are displayed together with the &class="macro">#x27;X&class="macro">#x27; format with class="num">11-character precision
  header="Header3";
  value1=INT_MAX;
  value2=INT_MAX;
  PrintFormat("%-16s(x) %-#class="num">22.4x(X) %-#class="num">22.11X",header,(class="type">class="kw">double)value1,(class="type">class="kw">double)value2);

  class=class="str">"cmt">/* Sample output:
      Header1(d) class="num">2147483647          (i) class="num">02147483647
      Header2(u) class="num">4290772992          (o) class="num">037760000000
      Header3(x) 0xffc00000          (X) 0X000FFC00000
   */
}
class="type">void OnStart()
  {
class=class="str">"cmt">//--- Declare the variables to be printed
  class="type">class="kw">string  header=""; class=class="str">"cmt">// Data header
  class="type">class="kw">double  value1=class="num">0;  class=class="str">"cmt">// First value
  class="type">class="kw">double  value2=class="num">0;  class=class="str">"cmt">// Second value

class=class="str">"cmt">//--- The first line with a header in a class="num">16-character field and data in class="num">22-character fields
class=class="str">"cmt">//--- The header and data of all fields are pressed to the left edge.
class=class="str">"cmt">//--- Data values of the second field are displayed together with the &class="macro">#x27;e&class="macro">#x27; format with class="num">4-character precision
class=class="str">"cmt">//--- Data values of the third field are displayed together with the &class="macro">#x27;E&class="macro">#x27; format with class="num">11-character precision
  header="Header1";
  value1=DBL_MAX;
  value2=DBL_MAX;
  PrintFormat("%-16s(e) %-class="num">22.4e(E) %-#class="num">22.11E",header,(class="type">class="kw">double)value1,(class="type">class="kw">double)value2);

class=class="str">"cmt">//--- The second line with a header in a class="num">16-character field and data in class="num">22-character fields
class=class="str">"cmt">//--- The header and data of all fields are pressed to the left edge.
class=class="str">"cmt">//--- Data values of the second field are displayed together with the &class="macro">#x27;f&class="macro">#x27; format with class="num">4-character precision
class=class="str">"cmt">//--- Data values of the third field are displayed together with the &class="macro">#x27;f&class="macro">#x27; format with class="num">11-character precision
  header="Header2";
  value1=SymbolInfoDouble(Symbol(),SYMBOL_ASK);
  value2=SymbolInfoDouble(Symbol(),SYMBOL_ASK);

「用 PrintFormat 对齐报价与极值输出」

在 MT5 脚本里做价格行为日志时，PrintFormat 的格式化串比手动拼字符串更省事。下面这段把表头固定占 16 字符、数据域占 22 字符且全部左对齐，第二列用 (g) 格式保留 4 位有效数，第三列用 (G) 格式保留 11 位有效数。实际跑出来，Header1 行第二列会打出 1.798e+308（即 DBL_MAX），第三列是当时 SYMBOL_ASK 的 1.2731600000；Header2 行反过来，第二列只显示 1.273（精度截断到 4 位），第三列是 1.7976931349E+308。外汇与贵金属报价跳动快，这种对齐方式便于你肉眼比对跨品种点差。若把第三列格式换成 (s) 并强转 string，就能直接把 SymbolInfoDouble 取到的 ask 当文本落盘，避免浮点格式在日志里被四舍五入。开 MT5 新建脚本粘入下方代码，改 Symbol() 为具体品种如 XAUUSD，即可验证不同格式串的差异。

MQL5 / C++

class="type">void OnStart()
  {
class=class="str">"cmt">//--- Declare the variables to be printed
   class="type">class="kw">string  header="";   class=class="str">"cmt">// Data header
   class="type">class="kw">double  value1=class="num">0;    class=class="str">"cmt">// First value
   class="type">class="kw">double  value2=class="num">0;    class=class="str">"cmt">// Second value

class=class="str">"cmt">//--- The first line with a header in a class="num">16-character field and data in class="num">22-character fields
class=class="str">"cmt">//--- The header and data of all fields are pressed to the left edge.
class=class="str">"cmt">//--- Data values of the second field are displayed together with the &class="macro">#x27;g&class="macro">#x27; format with class="num">4-character precision
class=class="str">"cmt">//--- Data values of the third field are displayed together with the &class="macro">#x27;G&class="macro">#x27; format with class="num">11-character precision
   header="Header1";
   value1=DBL_MAX;
   value2=SymbolInfoDouble(Symbol(),SYMBOL_ASK);
   PrintFormat("%-16s(g) %-class="num">22.4g(G) %-#class="num">22.11G",header,(class="type">class="kw">double)value1,(class="type">class="kw">double)value2);

class=class="str">"cmt">//--- The second line with a header in a class="num">16-character field and data in class="num">22-character fields
class=class="str">"cmt">//--- The header and data of all fields are pressed to the left edge.
class=class="str">"cmt">//--- Data values of the second field are displayed together with the &class="macro">#x27;g&class="macro">#x27; format with class="num">4-character precision
class=class="str">"cmt">//--- Data values of the third field are displayed together with the &class="macro">#x27;G&class="macro">#x27; format with class="num">11-character precision
   header="Header2";
   value1=SymbolInfoDouble(Symbol(),SYMBOL_ASK);
   value2=DBL_MAX;
   PrintFormat("%-16s(g) %-#class="num">22.4g(G) %-#class="num">22.11G",header,(class="type">class="kw">double)value1,(class="type">class="kw">double)value2);
  }

◍ PrintFormat 里 c/C 与 d/i 的格式差异

在 MT5 脚本排错时，PrintFormat 的格式符直接决定终端里你能看到什么。用 %c 打印 char 类型 65 得到字母 A，用 %C 打印 66 得到 B；换成 %d 或 %i 打印同样数值，终端只显示整数 65、66。 left-align 的 %-10c 和 %-10C 都占 10 字符宽，但大小写格式符对 char 的解释输出一致，仅语义上区分单字节与宽字符。下面这段可直接贴进 EA 的 OnStart 验证：声明 header 为空串、value1/value2 为 char 初值 0，随后分三行打印。第一行 Header1 配 (c) A (C) B，第二行 Header2 配 (c) C (C) D，第三行 Header3 用 (d) 65 (i) 66。跑完在专家日志里对照样例输出，能确认格式串没写错。外汇与贵金属行情里 SymbolInfoDouble(Symbol(),SYMBOL_ASK) 取到的卖价，若用 %-#22.4s 截断成 4 字符精度，1.2872 会显示成 1.28。这种截断在快速扫日志时有用，但高频策略里可能漏看小数点后细微跳动，属高风险品种下的信息损失，建议只在人工巡检时用。

MQL5 / C++

class=class="str">"cmt">//--- Data values of the third field are displayed together with the &class="macro">#x27;s&class="macro">#x27; format with class="num">4-character precision
  header="Header2";
  value1=DBL_MAX;
  value2=SymbolInfoDouble(Symbol(),SYMBOL_ASK);
  PrintFormat("%-16s(g) %-#class="num">22.5g(s) %-#class="num">22.4s",header,(class="type">class="kw">double)value1,(class="type">class="kw">string)value2);
  
  class=class="str">"cmt">/* Sample output:
      Header1(g) class="num">1.798e+308            (s) class="num">1.2872                 
      Header2(g) class="num">1.7977e+308           (s) class="num">1.28                   
  */
  }
class="type">void OnStart()
  {
class=class="str">"cmt">//--- Declare the variables to be printed
   class="type">class="kw">string  header="";  class=class="str">"cmt">// Data header
   class="type">char    value1=class="num">0;   class=class="str">"cmt">// First value
   class="type">char    value2=class="num">0;   class=class="str">"cmt">// Second value
  
class=class="str">"cmt">//--- The first line with a header in a class="num">16-character field and data in class="num">10-character fields
class=class="str">"cmt">//--- The header and data of all fields are pressed to the left edge.
class=class="str">"cmt">//--- Data values of the second field are displayed together with the &class="macro">#x27;c&class="macro">#x27; format
class=class="str">"cmt">//--- Data values of the third field are displayed together with the &class="macro">#x27;C&class="macro">#x27; format
   header="Header1";
   value1=class="num">65;
   value2=class="num">66;
   PrintFormat("%-16s(c) %-10c(C) %-10C",header,(class="type">char)value1,(class="type">char)value2);
  
class=class="str">"cmt">//--- The second line with a header in a class="num">16-character field and data in class="num">10-character fields
class=class="str">"cmt">//--- The header and data of all fields are pressed to the left edge.
class=class="str">"cmt">//--- Data values of the second field are displayed together with the &class="macro">#x27;c&class="macro">#x27; format
class=class="str">"cmt">//--- Data values of the third field are displayed together with the &class="macro">#x27;C&class="macro">#x27; format
   header="Header2";
   value1=class="num">67;
   value2=class="num">68;
   PrintFormat("%-16s(c) %-10c(C) %-10C",header,(class="type">char)value1,(class="type">char)value2);
  
class=class="str">"cmt">//--- The third line with a header in a class="num">16-character field and data in class="num">10-character fields
class=class="str">"cmt">//--- The header and data of all fields are pressed to the left edge.
class=class="str">"cmt">//--- Data values of the second field are displayed together with the &class="macro">#x27;d&class="macro">#x27; format
class=class="str">"cmt">//--- Data values of the third field are displayed together with the &class="macro">#x27;i&class="macro">#x27; format
   header="Header3";
   value1=class="num">65;
   value2=class="num">66;
   PrintFormat("%-16s(d) %-10d(i) %-10i",header,(class="type">int)value1,(class="type">int)value2);
  
   class=class="str">"cmt">/* Sample output:
      Header1(c) A(C) B         
      Header2(c) C(C) D         
      Header3(d) class="num">65         (i) class="num">66        
   */
  }

把账户属性整齐打进日志的写法

MT5 里读账户信息分三族函数：AccountInfoInteger 取整数、AccountInfoDouble 取实数、AccountInfoString 取字符串。与其每次把全部属性罗列出来，不如给每类属性单独封一个打印函数，用的时候按需要拼装，日志可读性高得多。封装时建议传两个参数：标题字段宽度 header_width 和从左边缘的缩进 indent。若 header_width 传 0，函数内部自动取标题文本长度 +1，等于不做对齐强制；indent 传 0 则无缩进。这样单属性调试能直接调，批量输出时再统一给宽度和缩进。格式串里 %*s 是关键：星号位置由参数填缩进值，对应传一个空字符串，就能用空格垫出任意空字段；标题宽度也用 %-*s 接 w 变量控制。下面这段摘了登录号和账户类型的打印函数，能看到整数直接转型输出，枚举型先 EnumToString 再截掉前缀、首字母大写。 [CODE] //+------------------------------------------------------------------+

//	Print a description of the account number into the journal

//+------------------------------------------------------------------+ void AccountLoginPrint(const uint header_width=0,const uint indent=0) { //--- Define the header text and the width of the header field //--- If the header width is passed to the function equal to zero, then the width will be the size of the header line + 1 string header="Login:"; uint w=(header_width==0 ? header.Length()+1 : header_width); //--- Print the property value in the log with a header with the required width and indentation PrintFormat("%*s%-*s%-s",indent,"",w,header,(string)AccountInfoInteger(ACCOUNT_LOGIN)); /* Sample output: Login: 68008618 */ } //+------------------------------------------------------------------+

//	Print a trading account type into the journal

//+------------------------------------------------------------------+ void AccountTradeModePrint(const uint header_width=0,const uint indent=0) { //--- Get the value of the trading account type ENUM_ACCOUNT_TRADE_MODE trade_mode=(ENUM_ACCOUNT_TRADE_MODE)AccountInfoInteger(ACCOUNT_TRADE_MODE); //--- "Cut out" the name of the trading account type from the line obtained from enum string mode=StringSubstr(EnumToString(trade_mode),19); //--- Convert the characters of the resulting line to lower case and replace the first letter from small to capital if(mode.Lower()) mode.SetChar(0,ushort(mode.GetChar(0)-0x20)); //--- Define the header text and the width of the header field //--- If the header width is passed to the function equal to zero, then the width will be the size of the header line + 1 string header="Trade mode:"; uint w=(header_width==0 ? header.Length()+1 : header_width); //--- Print the property value in the log with a header with the required width and indentation PrintFormat("%*s%-*s%-s",indent,"",w,header,mode); /* Sample output: Trade mode: Demo */ } //+------------------------------------------------------------------+

//	Print a description of the provided leverage size in the journal

//+------------------------------------------------------------------+ 逐行拆解：AccountLoginPrint 中 header 写死 "Login:"，w 在零宽时取字符串长+1；PrintFormat 的 "%*s%-*s%-s" 依次吃 indent、空串、w、header、登录号转字符串，样例输出 Login: 68008618。AccountTradeModePrint 先读 ACCOUNT_TRADE_MODE 整数转枚举，EnumToString 后从索引 19 截掉 "ACCOUNT_TRADE_MODE_" 前缀，Lower 再手动把首字母加 0x20 变大写，最后同样用 PrintFormat 输出，样例得 Trade mode: Demo。真要一次看全貌，写个总函数按 ENUM_ACCOUNT_INFO_INTEGER、ENUM_ACCOUNT_INFO_DOUBLE、ENUM_ACCOUNT_INFO_STRING 顺序调一遍子函数即可。脚本里用标题宽 20、缩进 2 调用，日志里每行前面空两格、标题占 20 宽，扫一眼就能核对杠杆、净值、信用等字段。外汇和贵金属账户这类属性随券商策略变动，高杠杆意味着回撤可能被放大，核对完记得结合风控参数看。

MQL5 / C++

class=class="str">"cmt">//+------------------------------------------------------------------+
class=class="str">"cmt">//| Print a description of the account number into the journal       |
class=class="str">"cmt">//+------------------------------------------------------------------+
class="type">void AccountLoginPrint(const class="type">uint header_width=class="num">0,const class="type">uint indent=class="num">0)
  {
class=class="str">"cmt">//--- Define the header text and the width of the header field
class=class="str">"cmt">//--- If the header width is passed to the function equal to zero, then the width will be the size of the header line + class="num">1
   class="type">class="kw">string header="Login:";
   class="type">uint w=(header_width==class="num">0 ? header.Length()+class="num">1 : header_width);
class=class="str">"cmt">//--- Print the class="kw">property value in the log with a header with the required width and indentation
   PrintFormat("%*s%-*s%-s",indent,"",w,header,(class="type">class="kw">string)AccountInfoInteger(ACCOUNT_LOGIN));
   class=class="str">"cmt">/* Sample output:
       Login: class="num">68008618
   */
  }
class=class="str">"cmt">//+------------------------------------------------------------------+
class=class="str">"cmt">//| Print a trading account type into the journal                    |
class=class="str">"cmt">//+------------------------------------------------------------------+
class="type">void AccountTradeModePrint(const class="type">uint header_width=class="num">0,const class="type">uint indent=class="num">0)
  {
class=class="str">"cmt">//--- Get the value of the trading account type
   ENUM_ACCOUNT_TRADE_MODE trade_mode=(ENUM_ACCOUNT_TRADE_MODE)AccountInfoInteger(ACCOUNT_TRADE_MODE);
class=class="str">"cmt">//--- "Cut out" the name of the trading account type from the line obtained from enum
   class="type">class="kw">string mode=StringSubstr(EnumToString(trade_mode),class="num">19);
class=class="str">"cmt">//--- Convert the characters of the resulting line to lower case and replace the first letter from small to capital
   if(mode.Lower())
      mode.SetChar(class="num">0,class="type">class="kw">ushort(mode.GetChar(class="num">0)-0x20));
class=class="str">"cmt">//--- Define the header text and the width of the header field
class=class="str">"cmt">//--- If the header width is passed to the function equal to zero, then the width will be the size of the header line + class="num">1
   class="type">class="kw">string header="Trade mode:";
   class="type">uint w=(header_width==class="num">0 ? header.Length()+class="num">1 : header_width);
class=class="str">"cmt">//--- Print the class="kw">property value in the log with a header with the required width and indentation
   PrintFormat("%*s%-*s%-s",indent,"",w,header,mode);
   class=class="str">"cmt">/* Sample output:
       Trade mode: Demo
   */
  }
class=class="str">"cmt">//+------------------------------------------------------------------+
class=class="str">"cmt">//| Print a description of the provided leverage size in the journal |
class=class="str">"cmt">//+------------------------------------------------------------------+