通过年月判断天数

coding>C++
748 词

使用最简单的if语句实现给定年月判断天数

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#include<bits/stdc++.h> using namespace std;
int main() {
int y, m, d;
cin &gt;&gt; y &gt;&gt; m;
if (y % 4 == 0 && y % 100 != 0  y % 100 == 0 && y % 400 == 0) {
if (m == 1  m == 3) { d = 31; }
if (m == 5  m == 7) { d = 31; }
if (m == 8  m == 10) { d = 31; }
if (m == 12) { d = 31; }
if (m == 4  m == 6) { d = 30; }
if (m == 9  m == 11) { d = 30; }
if (m == 2) { d = 29; }
}
else {
if (m == 1  m == 3) { d = 31; }
if (m == 5  m == 7) { d = 31; }
if (m == 8  m == 10) { d = 31; }
if (m == 12) { d = 31; }
if (m == 4  m == 6) { d = 30; }
if (m == 9  m == 11) { d = 30; }
if (m == 2) { d = 28; }
}
cout &lt;&lt; d &lt;&lt; endl;
return 0;
}