习题4-5 换硬币

#include<stdio.h>
int main()
{
    int money,n1,n2,n5,count;/*每种硬币至少有一枚，所以本题n1,n2,n5不能=0*/
    
    
    count=0;
    scanf("%d",&money);
    if(money<=8||money>=100){
        printf("Invalid!");
    }else{
        for(n5=money/5; n5>0; n5--){
            for((n2=money-n5*5)/2; n2>0; n2--){
                for(n1=money-n5*5-n2*2; n1>0; n1--){
                    if(n5*5+n2*2+n1==money){
                        printf("fen5:%d, fen2:%d, fen1:%d, total:%d\n", n5,n2,n1,n1+n2+n5);
                            count++;   
                    }
                }
            }
        }
    }
    printf("count = %d",count);
    
    return 0;
}