题解 | #单词替换#

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

using namespace std;

int main() {
    string ori;
    string beReplace;
    string target;

    getline(cin, ori);
    cin >> beReplace >> target;

    vector<string> vec;
    istringstream input(ori);

    string StringtoVec;
    while (input >> StringtoVec) {
        vec.push_back(StringtoVec);
    }

    for (auto& elem : vec) {
        if (elem == beReplace) {
            elem = target;
        }
    }

    for (auto elem : vec) {
        cout << elem << " ";
    }
    cout << endl;
    return 0;
}