A simple problem

4
2
3
7
168

0.5
0.3
0.142857
0.005952380

#include <stdio.h>
#include <string.h>
#define maxn 100002

bool vis[maxn];

int main()
{
    int n, i, t, m;
    scanf("%d", &t);
    while(t--){
        scanf("%d", &n);
        if(n < 0){
            printf("-"); n = -n;
        }
        if(n == 1){
            printf("1\n"); continue;
        }        
        memset(vis, 0, sizeof(bool) * n);
        printf("0."); m = 1; vis[0] = 1;
        while(!vis[m]){
            vis[m] = 1; m *= 10;
            printf("%d", m / n);
            m %= n;
        }
        printf("\n");
    }
    return 0;
}

HDU2522 A simple problem 【模拟】

原文：http://blog.csdn.net/chang_mu/article/details/38796869