警告：建议用作真值赋值左右括号[-Wparentheses] [英] warning: suggest parentheses around assignment used as truth value [-Wparentheses]

问题描述

1. 节目片段是为素数提取写的。



2. 该警告是由编译器作为之类的标题抛出。

1. The program snippet was written for prime number extraction.

2. The warning was thrown by the compiler as that like the title.

while(count<=n)
{ 
  for(c=2;c=(i-1);c++) //the warning is shown here
  { 
     if(i%c==0) 
       break; 
  }     
  if(c==i) 
  { 
     printf("%d ",i); 
     count++; 
  } 
  i++; 
}

感谢你提前！

推荐答案

的如果语句的中间前pression通常是有条件的，如 I＆LT; ñ。你的情况，这是一个任务。

The middle expression of an if statement is usually a conditional such as i < n. In your case, it is an assignment.

编译器警告你，或许你犯了一个错误，你想用

The compiler is warning you that perhaps you made a mistake and you meant to use

c == (i-1)

而不是

c = (i-1)

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