链接
题目描述
给出一个字符串，要求将其中的某个单词全部替换成新单词
样例输入
You want someone to help you
You
I
样例输出
I want someone to help you
思路
就还是硬模拟呗
用erase（删一段）和insert（插入一段）函数
代码
#include<algorithm>
#include<iostream>
#include<cstring>
#include<string>
#include<cstdio>
using namespace std;
char sp;
int n, l, k;
string a, b, s, str[1005];
int main()
{
do {
cin>>str[++n];
s += str[n];
s += " ";
sp = getchar();
}while(sp == ' ');
s = " " + s;
cin>>a; a = " " + a + " ";
cin>>b; b = " " + b + " ";
int len = a.length(), k = s.find(a, 0), l = k;
while(k != -1)
{
s.erase(k, len);
s.insert(k, b);
k = s.find(a, l + 1);
l = k;
}
cout<<s.substr(1, s.length() - 1) << endl;
return 0;
}