hdu 1002 A + B Problem II（大正整数相加）

#include<cstdio>
#include<cstring>
#define Min(a,b) ((a)<(b)?(a):(b))
using namespace std;

char s1[10000],s2[10000],s3[10000];

int main()
{
int t;
scanf("%d",&t);
int tt=0;
while(t--)
{
++tt;
if(tt!=1)
printf("\n");
scanf("%s%s",s1,s2);
int len1,len2,len3;
len1=strlen(s1);
len2=strlen(s2);
len3=Min(len1,len2);
int k=0;
int i=len1-1;
int j=len2-1;
int pos=0;
while(len3--)
{
int temp=(s1[i--]-'0'+s2[j--]-'0'+k);
s3[pos++]=(temp%10+'0');
k=temp/10;
}
if(i==-1&&j==-1)
{
if(k!=0)
s3[pos++]=k+'0';
}
else if(i==-1&&j!=-1)
{

while(j>=0)
{
int temp=s2[j--]-'0'+k;
s3[pos++]=(temp%10+'0');
k=temp/10;
}
if(k!=0)
s3[pos++]=k+'0';
}
else
{
while(i>=0)
{
int temp=s1[i--]-'0'+k;
s3[pos++]=(temp%10+'0');
k=temp/10;
}
if(k!=0)
s3[pos++]=k+'0';
}
printf("Case %d:\n",tt);
printf("%s + %s = ",s1,s2);
for(i=pos-1;i>=0;i--)
{
printf("%c",s3[i]);
}
printf("\n");
}
return 0;
}