C++版split(‘_‘)函数

1 使用stringstream

#include 
#include 
#include  
#include 

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 
#include  
#include 

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;
}