#include<stdio.h>
int main()
{
int x;
for(x=0; x<5; x++)
{
printf("x = %d\n",i);
}
return 0;
}
上面程序在VC++6.0中输出结果：
x = 0
x = 1
x = 2
x = 3
x = 4
Press any key to continue
××××××××××××××××××××××××××××××
==========for嵌套===========
当for循环体也为for语句时，则叫for循环嵌套
例如：
#include<stdio.h>
#define uchar unsigned char
#define uint unsigned int
int main()
{
uchar x, y;
for(x=0; x<5; x++)
{
printf("x = %d,",x);
for(y=0; y<3; y++)
{
printf("y = %d,",y);
}
printf("\n");
}
return 0;
}
上面程序在VC++6.0中输出结果：
x = 0,y = 0,y = 1,y = 2,
x = 1,y = 0,y = 1,y = 2,
x = 2,y = 0,y = 1,y = 2,
x = 3,y = 0,y = 1,y = 2,
x = 4,y = 0,y = 1,y = 2,
Press any key to continue
由此可见，x每变化一次，y就变化3次
单片机学习之：C语言基础——for循环及for嵌套,布布扣,bubuko.com
原文：http://www.cnblogs.com/czf-gd/p/3924416.html