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#include<iostream>
#include<string>
using namespace std;
#define Max 1000
int num1[Max];
int num2[Max];
struct bigadd
{
string str1;
string str2;
int * result;
int len;
};
int main()
{
string str1,str2;
int i;
bool flag=false;
int casenumber,len1,len2,len,hold=0;
bigadd * arr;
memset(num1,0,sizeof(num1));
memset(num2,0,sizeof(num2));
cin>>casenumber;
arr = new bigadd[casenumber];
for(i=0;i<casenumber;i++)
{
cin>>str1>>str2;
arr[i].str1=str1;
arr[i].str2=str2;
len1=str1.length();
len2=str2.length();
for(int k=len1-1;k>=0;k--)
{
num1[len1-1-k]=str1[k]-'0';
}
for(int j=len2-1;j>=0;j--)
{
num2[len2-1-j]=str2[j]-'0';
}
len=len1>len2?len1:len2;
arr[i].len=len;
arr[i].result=new int[len+1];
for(int k=0;k<=len;k++)
{
num1[k]+=num2[k]+hold;
if(num1[k]>=10)
{
hold=num1[k]/10;
num1[k]=num1[k]%10;
}
else
hold=0;
}
for(int l=0;l<=len;l++)
{
arr[i].result[l]=num1[l];
}
memset(num1,0,sizeof(num1));
memset(num2,0,sizeof(num2));
}
for( i=0;i<casenumber;i++)
{
cout<<"Case"<<" "<<i+1<<":"<<endl;
cout<<arr[i].str1<<" "<<"+"<<" "<<arr[i].str2<<" "<<"="<<" ";
for(int j=arr[i].len;j>=0;j--)
{
if(arr[i].result[j]||flag)
{
flag=true;
cout<<arr[i].result[j];
}
}
cout<<endl<<endl;
}
}