Detailed explanation of the execution order of the expression and loop body in the for loop

For learning c To a friend ,for Loop may be a kind of loop statement that we often use

for( expression 1; expression 2; expression 3）{ The loop body }

Knowing the execution order of its statements can avoid many mistakes for us

We can use the following small program to easily measure the internal statement cycle order ：

#include<stdio.h>
void main()
{
int i;
for (printf("#1\n"),i=1;
  printf("#2\n"),i<=5;
  printf("#3\n"),i++)
{
    printf("hello\n");
}
}

It is not difficult to see from the above execution results for Except for the expression in the loop 1 To initialize variables , Its loop is an expression 2—— The loop body —— expression 3—— expression 2 This cycle .

The above article is correct for The detailed explanation of the execution sequence of expressions and loop bodies in the loop is all that Xiaobian has shared with you , I hope I can give you a reference , I also hope you can support the open source world .

Complete example ：http://github.crmeb.net/u/defu

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