题解 | 计算日期到天数转换

#include <iostream>
using namespace std;

static bool isLeapYear(int year) {
    return ((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0);
}

int main() {
    int a, b, c;
    int arr[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
    while (cin >> a >> b >> c) {
        if (isLeapYear(a)) {
            arr[1] = 29;
        }

        int sum = c;

        for (int i = 0; i < b - 1; i++)
            sum += arr[i];

        cout << sum << endl;

    }

    return 0;
}