题解 | 牛牛数数

#include <stdio.h>

int main() {
	//1.个位数是4
	//2.十位数是4
	// ...
	//3.是四的倍数
	int n = 0;
	int include_four = 0;
	scanf("%d", &n);
	for (int i = 1; i <= n; i++) {
		include_four = i;
		//数字不是4的倍数
		if (i % 4 == 0) {
			continue;
		}
		else {
			while (include_four) {
				if (include_four % 10 == 4) {
					break;
				}
				else {
					include_four = include_four / 10;
				}
				if (include_four == 0) {
					printf("%d\n", i);
				}
			}
		}
	}
	return 0;
}