题解 | #单词替换#

#include<iostream>
#include<string>
#include<vector>

using namespace std;
int main() {
    string sentence, target_str, replace_str;
    getline(cin, sentence);
    getline(cin, target_str);
    getline(cin, replace_str);
    sentence = sentence + " ";
    vector<string>words;
    string temp_str = "";
    for (int i = 0; i < (int)sentence.size(); i++) {
        if (sentence[i] != ' ') {
            temp_str = temp_str + sentence[i];
        } else {
            words.push_back(temp_str);
            temp_str = "";
        }
    }
    for (auto iter = words.begin(); iter != words.end(); iter++) {
        if ((*iter) != target_str) {
            cout << *iter << " ";
        } else {
            cout << replace_str << " ";
        }


    }


}