hdu4278

八进制转十进制

#include <stdio.h>int a[10]={0,1,2,0,3,4,5,6,0,7}; int N; int main(){int ans, k, tmp; while(scanf("%d", &N)!=EOF && N){tmp = N; ans = 0; k=1; while(N){ans += a[N%10]*k; k *= 8; N /= 10; }printf("%d: %d\n", tmp, ans); }return 0; }