C++ 获取字符串中单词

直接模拟

vector get(string str){
    vector res;
    string word;
    for (auto c: str){
        if (c == ' '){
            res.push_back(word);
            word = "";
        }
        else word += c;
    }
    res.push_back(word);
    return res;
}

利用substr进行字符串截取

vector get(string str) {
    vector res;
    string word;
    for(int i = 0, j = 0; i <= str.size(); ++i) {
        if(i == str.size() || str[i] == ' ') {
            word = str.substr(j, i-j);
            j = i+1;
            res.push_back(word);
        }
    }
    return res;
}

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