C++使用sscanf方便地读取数据

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class Solution {
public:
    int get(string s) {
        int h, m;
        sscanf(s.c_str(), "%d:%d", &h, &m);
        return h * 60 + m;
    }

    int numberOfRounds(string startTime, string finishTime) {
        int x = get(startTime), y = get(finishTime);
        if (x > y) y += 24 * 60;
        return y / 15 - (x + 14) / 15;
    }
};