将文本文件中指定的字符串替换成新字符串。 由于目前的OJ系统暂时不能支持用户读入文件，我们编写程序从键盘输入文件中的内容，当输入的一行为end时，表示结束。end后面有两个字符串，要求用第二个字符串替换文本中所有的第一个字符串。
输入格式:
Xi’an Institute of Posts and Telecommunications is co-designed and implemented by the People’s Government of Shaanxi Province and the Ministry of Industry and Information Technology. The Institute is located in Xi’an, a historic city in Northwest China, famous for its magnificent ancient culture.
end （表示结束）
Institute （第一个字符串，要求用第二个字符串替换）
University （第二个字符串）
输出格式:
Xi’an University of Posts and Telecommunications is co-designed and implemented by the People’s Government of Shaanxi Province and the Ministry of Industry and Information Technology.The University is located in Xi’an, a historic city in Northwest China, famous for its magnificent ancient culture.
输入样例:
Xi’an Institute of Posts and Telecommunications is co-designed and implemented by the People’s Government of Shaanxi Province and the Ministry of Industry and Information Technology.
The Institute is located in Xi’an, a historic city in Northwest China, famous for its magnificent ancient culture.
end
Institute
University
输出样例:
Xi’an University of Posts and Telecommunications is co-designed and implemented by the People’s Government of Shaanxi Province and the Ministry of Industry and Information Technology.The University is located in Xi’an, a historic city in Northwest China, famous for its magnificent ancient culture.
#include<iostream>
#include<cstring>
using namespace std;
int main()
{
string a,b,c,m;
getline(cin,a);
while(1)
{
getline(cin,m);
if(m=="end"){
break;
}
a+='\n';
a+=m;
}
a+='\n';
getline(cin,b);
getline(cin,c);
int found;
found=a.find(b);
while(found!=-1)
{
a.replace(found,b.size(),c);
found=a.find(b,found+1);
}cout<<a;
return 0;
}