#include "stdio.h"
void main()
{
    int score;
    do 
    {
        printf("请输入你的成绩(0-100):");
        scanf("%d",&score);
    }while(score<0||score>100);
    printf("你的成绩为:%d",score);
}

do-while循环判断成绩的有效输入

 

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