有关for循环和while循环的问题 [英] question about for loop and while loop

问题描述

void main()

int n=1;

for(;n<5;)
printf("%d",n);
n++;

}

1上面的for循环可以类似于while循环吗?当我们在循环之前初始化控制变量并在循环主体中递增/递减时

1 can above for loop is similar to while loop? when we initialize control variable before the loop and increment/decrement in the body of the loop

推荐答案

不太正确:您的版本永远不会停止打印-您需要"{"和}"包含循环内容，否则只会循环执行第一条语句.

但是:

Not quite: Your version would never stop printing - you need "{" and "}" to contain the loop contents, or the first statement only will be looped on.

But:

int i;
for (i = 0; i < 5; i++)
   printf("%d",i);

等同于:

Is the same as:

int i=0;
while (i < 5)
   {
   printf("%d",i);
   i++;
   }

或:

or:

int i=0;
for (;i < 5;)
   {
   printf("%d",i);
   i++;
   }

但是您不应该真正使用最后一个示例.

顺便说一句:一个好主意是，当您开始避免我一开始提到的那种问题时，始终在if条件循环中使用大括号！

But you shouldn''t really use the final example.

BTW: It is a good idea to always use curly brackets in a loop of if condition when you are starting to avoid just the kind of problem I mentions at the start!

这篇关于有关for循环和while循环的问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！