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高手帮忙 为何WA?

Posted by Garra at 2006-04-07 22:26:21 on Problem 2105
#include <iostream>
using namespace std;

int n;
char ip[30];
int power_2[8]={1,2,4,8,16,32,64,128};
int ip1,ip2,ip3,ip4;

int main()
{
    cin>>n;int j;
    for(int i=0;i<n;i++)
    {
        cin>>ip;ip1=0;ip2=0;ip3=0;ip4=0;
        for(j=0;j<=7;j++)
        {
            ip1+=(ip[j]-'0')*power_2[7-j];
        }
        for(j=8;j<=15;j++)
        {
            ip2+=(ip[j]-'0')*power_2[15-j];
        }    
        for(j=16;j<=23;j++)
        {
            ip3+=(ip[j]-'0')*power_2[23-j];
        }    
        for(j=24;j<=31;j++)
        {
            ip4+=(ip[j]-'0')*power_2[31-j];
        }        
        cout<<ip1<<'.'<<ip2<<'.'<<ip3<<'.'<<ip4<<endl;
    }    
    return 0;
}    





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