http://acm.hdu.edu.cn/showproblem.php?pid=1002
我的代码和输出(输出没有代码中的注释)：
#include <iostream>
#include <cstdio>
#include <cstdlib>
using namespace std;
const size_t BufferSize = 1024;
const size_t BufferLen = BufferSize-1;
char szFirst[BufferSize]={0};
char szSecond[BufferSize]={0};
char szResult[BufferSize]={0};
char* pResult=szResult+BufferLen;
const char* Sum(const string& sFirst,const string& sSecond)
{
int iCarry=0;
int iSum;
int idxFirst=sFirst.size()-1;
int idxSecond=sSecond.size()-1;
char* pResult=szResult+BufferLen;
int iFirst;
int iSecond;
for(;idxFirst>=0||idxSecond>=0;)
{
iFirst = idxFirst>=0?sFirst[idxFirst]-'0':0;
iSecond = idxSecond>=0?sSecond[idxSecond]-'0':0;
iSum = iFirst+iSecond+iCarry;
iCarry = iSum/10;
*pResult = char(iSum%10) + '0';
--pResult;
--idxFirst;
--idxSecond;
}
if(iCarry)
{
*pResult = iCarry+'0';
}
else
{
++pResult;
}
return pResult;
}
int main()
{
int a;
cin >> a;
for(int i=1;i<=a;++i)
{
cin >> szFirst;
cin >> szSecond;
printf("Case %d: \n",i);
printf("%s + %s = %s \n\n",szFirst,szSecond,Sum(szFirst,szSecond));
}
}
//Case 1:
//1 + 2 = 3
//
//Case 2:
//112233445566778899 + 998877665544332211 = 1111111111111111110
//
文字描述中的 Case用的是‘.’，示例输出用的是‘:’，
我都试过了，用‘.’是“Wrong Answer”，‘:’就是“PE”了。
