Initial commit

Miscellaneous/date_difference.cpp

@@ -0,0 +1,49 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+struct Date {
+	int year;
+	int month;
+	int day;
+} d1, d2;
+
+int m[2][13] = {
+	{ 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
+	{ 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
+};
+
+int count(struct Date *p_d);
+
+int main(int argc, char *argv[]) {
+	int ans = 0;
+
+	scanf("%d %d %d", &d1.year, &d1.month, &d1.day);
+	scanf("%d %d %d", &d2.year, &d2.month, &d2.day);
+
+	for (int i = d1.year; i < d2.year; i++) {
+		if ((i % 100 != 0 && i % 4 == 0) || i % 400 == 0)
+			ans += 366;
+		else
+			ans += 365;
+	}
+
+	ans += count(&d2) - count(&d1);
+
+	printf("%d\n", ans);
+
+	return 0;
+}
+
+int count(struct Date *p_d) {
+	int n = 0;
+
+	if ((p_d->year % 100 != 0 && p_d->year % 4 == 0) || p_d->year % 400 == 0)
+		for (int i = 1; i < p_d->month; i++)
+			n += m[1][i];
+	else
+		for (int i = 1; i < p_d->month; i++)
+			n += m[0][i];
+
+	return n + p_d->day;
+}