// test14.cpp : 定义控制台应用程序的入口点。

//

#include "stdafx.h"

#include<iostream>

#include<fstream>

#include<string>

#include<cctype>

#include <vector>

#include<exception>

#include <initializer_list>

#include<stack>

#include <algorithm>

using namespace std;

class Solation

{

public:

	string fun(string &s,string oldVal,string newVal)

	{

	string:size_t pos = 0;

		while (pos<s.length())

		{

		pos = s.find(oldVal, pos);//从零号位置开始查找

			if (pos >= s.length()) break;//如果没有找到退出循环

			s.erase(pos,oldVal.length());//如果找到，先删除原来的字符

			s.insert(pos,newVal);//添加新的字符

	       //s.replace(pos,oldVal.length(),newVal);//和上面两句是等价的

			pos = pos + newVal.length();//移动pos位置

		}

		cout << s<< endl;

		return s;

	}

};

int main()

{

	string s = "WangDanPiaoLiang!";

	string oldVal = "Dan";

	string newVal = "dandan";

	Solation so;

	//so.fun(s,oldVal,newVal);

	cout << endl;

	string str = so.fun(s, oldVal, newVal);

	cout << str<< endl;

	return 0;

}