c语言中循环控制语句（do语句，限制用户输入数值的范围）
1、
#include <stdio.h>
int main(void) { int i; do { puts("please input an integer! the range is 0-2!"); printf("i = "); scanf("%d", &i); } while (i < 0 || i > 2); ## 此句判断为非0，则继续执行循环体 switch (i) { case 0: puts("you had choose stone!"); break; case 1: puts("you had choose scissors!"); break; case 2: puts("you had choose clothes!"); break; } return 0; }