C++版split(‘_‘)函数

1 使用stringstream

#include <iostream>
#include <sstream>
#include <string> 
#include <vector>using namespace std;vector<string> split(string str, char separator) {vector<string> res;stringstream ss(str);string t;while (getline(ss, t, separator)) {res.emplace_back(t);}return res;
}int main() {string str = "../../Hello_World_I_am_a_string";vector<string> vec = split(str, '_');for (auto x : vec) {cout << x << endl;}return 0;
}

2 使用双指针算法

#include <iostream>
#include <string> 
#include <vector>using namespace std;vector<string> split(string str, char separator) {vector<string> res;for (int i = 0, j = 0; i < str.size(); ++i) {j = i;while (j < str.size() && str[j] != separator) {j++;}string t = str.substr(i, j-i);res.emplace_back(t);i = j;}return res;
}int main() {string str = "../../Hello_World_I_am_a_string";vector<string> vec = split(str, '_');for (auto x : vec) {cout << x << endl;}return 0;
}