给出一百分制成绩，要求输出成绩等级‘A’、‘B’、‘C’、‘D’、‘E’。 90分以上为A 80-89分为B 70-79分为C 60-69分为D 60分以下为E

#include
int main()
{
    float m;
    scanf("%d",&m);
    if(m>100||m<0)
        printf("input is wrong!");
    else
        if(m>=90)
            printf("A\n");
        else
            if(m>=80)
                printf("B\n");
            else
                if(m>=70)
                    printf("C\n");
                else
                    if(m>=60)
                        printf("D\n");
                    else
                        printf("E\n");
                    return 0;
}