A + B Problem II &&http://acm.hdu.edu.cn/showproblem.php?pid=1002

水题继续。。大数相加。。

#include<iostream>
#include<string>
#include<algorithm>
#include<string.h>
using namespace std;
int a[1001];
int main()
{ int n;
cin>>n;
for(int v=1;v<=n;++v)
{ string s,s1;
cin>>s>>s1;
memset(a,0,sizeof(a));
int len1=s.size();
int len2=s1.size();
int len=max(len1,len2);
for(int i=len1-1;i>=0;--i)
a[i]+=s[len1-1-i]-'0';
for(int i=len2-1;i>=0;--i)
a[i]+=s1[len2-1-i]-'0';
int carry=0;
for(int i=0;i<=len;++i)
{ a[i]+=carry;
carry=a[i]/10;
a[i]%=10;
}
int p;
cout<<"Case "<<v<<":"<<endl;
cout<<s<<" + "<<s1<<" = " ;
for(int i=len;i>=0;--i)
if(a[i]!=0) {p=i;break;}
for(int i=p;i>=0;--i)
cout<<a[i];
cout<<endl;
if(v!=n) cout<<endl;
}return 0;
}