【C语言】判断学生成绩等级

方法一：if-else

#include<stdio.h>
 int main()
{
    printf("请输入成绩：\n");
    float score;
    scanf_s("%f", &score);
    if (score >= )
        printf("成绩等级为：A\n");
    else
        if (score >= )
            printf("成绩等级为：B\n");
        else
            if (score >= )
                printf("成绩等级为：C\n");
            else
                if (score >= )
                    printf("成绩等级为：D\n");
                else
                    printf("成绩等级为：E\n");
}

方法2：switch语句

#include<stdio.h>
 int main()
{
    printf("请输入成绩：\n");
    float score;
    scanf_s("%f", &score);
    switch ((int)score/)
    {
    case :
    case :printf("成绩等级为：A\n"); break;
    case :printf("成绩等级为：B\n"); break;
    case :printf("成绩等级为：C\n"); break;
    case :printf("成绩等级为：D\n"); break;
    default:printf("成绩等级为：E\n");

    }
}