poj3753,

## Problem:

 Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 3494 Accepted: 707

Description

`int SafeStrcpy2KeyWord(char* pDestBuffer,	//拷贝的目的地地址		       char* pSourceString,	//拷贝的源地址		       int nDestBufferSize,	//拷贝的目的地缓冲区长度		       char* szKeyWord);	//指定关键字符串`

Input

Output

Sample Input
`/home/tony/work_server/1/rtest/relayer.out//t/1/r.NULLEND`

Sample Output
`0 NULL5 /home22 /home/tony/work_server38 /home/tony/work_server/1/rtest/relayer0 NULL`

Source

## Solution:

Do whatever the problem told you to do, but take care:
1st, if there is no match with the keyword, return the whole string.
2nd, take care of the for loop. It takes me 3 or 4 WAs.

## Source Code:

//Fri May 28 12:55:30 CDT 2010
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <queue>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <ctime>

using namespace std;

int SafeStrcpy2KeyWord(string &des, string src, string keyword)
{
if (keyword == "NULL")
{
des.clear();
return 0;
}
int N = keyword.size();
int M = src.size();
for (int i = 0; i + N <= M; i++)
{
string str = src.substr(i, N);
if (str == keyword)
{
return i;
}
des += src[i];
}
return 0;
}

int main(int argc, const char* argv[])
{
// freopen("input.in", "r", stdin);
// freopen("output.out", "w", stdout);
string str;
while (cin >> str)
{
string s;
getchar();
while (getline(cin, s) && s != "END")
{
string des;
int len = SafeStrcpy2KeyWord(des, str, s);
if (len == 0 && des.size() == 0)
cout << "0 NULL" << endl;
else if (len == 0)
cout << str.size() << " " << str << endl;
else
cout << len << " " << str.substr(0, len) << endl;
}
}
// fclose(stdin);
// fclose(stdout);
return 0;
}
[/sourcecode]