PAT A 1027

#include<cstdio>
#include<string>
using namespace std;
int main()
{
    int a,b,c;
    char num[15] = {'0','1','2','3','4','5','6','7','8','9','A','B','C'};
    scanf("%d%d%d",&a,&b,&c);
    printf("#%c%c%c%c%c%c\n",num[a/13],num[a%13],num[b/13],num[b%13],num[c/13],num[c%13]);
    return 0;
}

/*
 发现不是两位数也有可能是三位数，那么b可能大于10，我服了
 对b也要做a一样的判断，而不是直接输出
*/
#include<cstdio>
#include<string>
using namespace std;
int main()
{
    int n,a,b;
    string str = "#";
    for(int i = 0;i<3;++i)
    {
        scanf("%d",&n);
        a = n%13;
        b = n/13;
        if(b>9) str += (b+'A'-10);
        else str += (b+'0');
        // str += (b+'0'); WA写法
        if(a>9) str += (a+'A'-10);
        else str += (a+'0');
    }
    printf("%s\n",str.c_str());
    return 0;
}