题解 | #参数解析#

#include <bits/stdc++.h>

using namespace::std;

int main() {

string str;

while (getline(cin, str)) {
    vector<string> vec;
    int j = 0; //记录起始索引
    for (int i = 0; i < str.size(); i++) {
        if (' ' == str[i]) {
            if (i != j) { //避免空串
                vec.push_back(str.substr(j, i - j));
            }
            j = i + 1;
        } else if ('"' == str[i]) {
            j = i + 1;
            i++;
            while (str[i] != '"') {
                i++;
            }
            if (i != j) {
                vec.push_back(str.substr(j, i - j));
            }
            j = i + 1;
        }
    }
    if (j < str.size()) { // 最后如果还剩一串字符
        vec.push_back(str.substr(j, str.size() - j));
    }
    cout << vec.size() << endl;
    for (auto const &v : vec) {
        cout << v << endl;
    }
}

return 0;

}