怎么用c语言回答下面的问题？

Question

Answer 1

哈喽，有用请点采纳哦

#include <stdio.h>
int main()
{
    int n;
    float res;
    scanf("%d",&n);
    if(n>=1&&n<=90){
        res = n*0.6;
    }else if(n>=91&&n<=150){
        res = 90*0.6+(n-90)*1.1;
    }else{
        res = 90*0.6+60*1.1+(n-150)*1.7;
    }
    printf("%.2f\n",res);
    return 0;
}