zoj 1334 进制转换类问题

#include <stdio.h>#include <string.h>#include <stdlib.h>#include <math.h>int main(void){ char in[1000]; int num[1000]; int from ,to,i; while (scanf("%s",in)!= EOF ) { int key = 0; int result[1000],j; scanf("%d %d",&from,&to); int len = strlen(in); num[len] = '/0'; for (i=0;i<len;i++) { if (in[i]>'9') num[i] = in[i] - 'A' + 10; else num[i] = in[i] - '0'; } for (i=len-1;i>=0;i--) { int temp = pow(from,len-1-i); num[i] = num[i] *temp; key += num[i] ; } i = 0; while (key) { result[i++] = key%to; key /= to; } result[i] = '/0'; if (i>7) { printf(" ERROR/n"); } else { for (j=0;j<7-i;j++) printf(" "); for (j=i-1;j>=0;j--) if(result[j] > 9) printf("%c",result[j]-10+'A'); else printf("%d",result[j]); printf("/n"); } } return 0;}