MT4智能交易编程教程-布尔类型

MT4智能交易

MT4智能交易编程教程-布尔类型

布尔类型是用来存储true或者false的逻辑值的，它们的数字表示法分别是1和0。

示例：

1. bool a = true;
   
2. bool b = false;
   
3. bool c = 1;
   

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内置法最多就是1字节，在逻辑表达式里可以注释，各种表达式都能用其他整数——编译器不会产生任何错误，在这种情况下，0值表示成false,其他值表示true。示例：

1. int i=5;
   
2.    double d=-2.5;
   
3.    if(i) Print("i = ",i," and is set to true");
   
4.    else Print("i = ",i," and is set to false");
   
5. 
   
6.    if(d) Print("d = ",d," and has the true value");
   
7.    else Print("d = ",d," and has the false value");
   
8. 
   
9.    i=0;
   
10.    if(i) Print("i = ",i," and has the true value");
    
11.    else Print("i = ",i," and has the false value");
    
12. 
    
13.    d=0.0;
    
14.    if(d) Print("d = ",d," and has the true value");
    
15.    else Print("d = ",d," and has the false value");
    
16. 
    
17. //--- 执行结果
    
18. //   i= 5 且有真值
    
19. //   d= -2.5 且有真值
    
20. //   i= 0 且有错误值
    
21. //   d= 0 且有错误值

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