202609241613_《score rate practise》

#include <iostream>
#include <stdio.h>
#include <cmath>
int main()
{
    int score;
    scanf("%d", &score);
    if (score <= 0)
    {
        printf("评分为D。\n");
    }
    else if (score <= 60)
    {
        printf("评分为D。\n");
    }
    else if (score >= 60 && score <= 69)
    {
        printf("评分为C。\n");
    }
    else if (score >= 60 && score <= 84)
    {
        printf("评分为B。\n");
    }
    else
    {
        printf("评分为A。\n");
    }
}