C++ 代码

#include<bits/stdc++.h>
using namespace std;
int main(){
    int num;
    char c[13] = {'0','1','2','3','4','5','6','7','8','9','A','B','C'};
    cout<<"#";
    for(int i = 0;i<3;i++){
        int ans[30],cnt=0;
        cin>>num;
        do{
            ans[cnt++] = num%13;
            num/=13;
        }while(num!=0);
        if(cnt==1) cout<<"0";
        for(int j=cnt-1;j>=0;j--) cout<<c[ans[j]];
    }    
    return 0;
}