hdu1047 Integer Inquiry

#include<iostream>#include<cstring>#include<cstdio>using namespace std;int main(){    char a[110],b[110],c[110],c1[110];    int n,ii;    int i,j;    int k,up;    scanf("%d",&n);    for(ii=0;ii<n;ii++){            memset(b,0,sizeof(b));        c1[0]='0';        c1[1]='\0';    while(scanf("%s",a)){        if(strlen(a)==1&&a[0]=='0') break;        i=strlen(a)-1;        j=strlen(b)-1;        k=0,up=0;        int x,y,z;        while(i>=0||j>=0){            if(i<0) x='0';else x=a[i];            if(j<0) y='0';else y=b[j];            z=x-'0'+y-'0';            if(up) z+=1;            if(z>9) {up=1;z%=10;} else up=0;            c[k++]=z+'0';            i--;j--;        }        if(up) c[k++]='1';        i=0;        for(k-=1;k>=0;k--)            c1[i++]=c[k];        c1[i]='\0';        memcpy(b,c1,sizeof(c1));    }    if(ii==n-1){        printf("%s\n",c1);        break;    }    printf("%s\n\n",c1);    }    return 0;}