C :

#include <stdio.h>
 int main()
 {
  int year=1900;
    while(year<=2000)
    {
      if((year%4 == 0&& year%100 != 0)|| (year%400 == 0))
     printf("%d\n",year);
     year = year+1;
    }
  return 0;
    }

C++ :

#include<stdio.h>
int main()
{
	int a;
	a=1900;
	while(a<=2000)
	{
		if((a%4==0&&a%100!=0)|(a%400==0))
		{
			printf("%d\n",a);
		}
	a++;
	}
	return 0; 
}