#include <stdio.h>
int main(int argc, char const *argv[])
{
    float score;
    printf("请输入你的成绩  ");
    scanf("%f", &score);
    if (score < 0 || score > 100)
    {
        printf("请输入0-100的数值\n");
    }
    else if (score >= 90){
        printf("A\n");
    }else if (score >= 80){
        printf("B\n");
    }else if (score >= 60) {
        printf("C\n");
    }else{
        printf("E\n");
    }
 
    return 0;
}

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

ODU=

85