POJ百练—IP地址转换

#include<iostream>
#include<cstdio>
#include<cstring>
using namespace std;
int sign[];
void change_to_8(int x)
{
    int index=;
    while(x)
    {
        if(x&)
        {
            sign[index]=;
        }
        x>>=;
        index--;
    }
}
int main()
{
    int a[];
    while(scanf("%d",&a[])&&a[]!=-)
    {
        char p;
        scanf("%c%d%c%d%c%d", &p, &a[], &p, &a[], &p, &a[]);
        for(int i=;i<;i++)
        {
            memset(sign,,sizeof(sign));
            change_to_8(a[i]);
            for(int i=;i<=;i++)
                printf("%d",sign[i]);
        }
        printf("\n");
    }

    return ;
}