编辑代码

#include <stdio.h>
int main () {
    int input_num;
    scanf("%d", &input_num);
    
    int i;
	int num;
	num = 0;
    for (i = 1; i <= input_num; ++i) {
		if ((i % 4 == 0 && i % 100 != 0) || i % 400 == 0) {
        num++;  
      } else {
        num = num;  
      }  
      
    }
    
    printf("The number of leap years is %d.", num); 
    return 0;
}