进制转换

#include<cstdio>
using namespace std;
char b[100];
int i,k,x,a[10000];
int main (){
    for (i=0;i<=9;i++)b[i]=(char)(i+'0');
    for (i=10;i<=36;i++)b[i]=(char)(i+55);
    while (scanf("%d%d",&k,&x)==2){
        bool fu=false;
        if (k==0){printf("0
");continue;}
        if (k<0){fu=true;k=-k;}
        int top=0;
        while(k){
            top++;
            a[top]=k%x;
            k=k/x;
        }
        if (fu)printf("-");
        for (i=top;i>=1;i--)printf("%c",b[a[i]]);
        printf("
");
    }
    return 0;
}