!== ----> !=
#include <stdio.h>
#include <math.h>
void main()
{
int year;
printf("please input a year:\n");
scanf("%d",&year);
if((year%4==0)&&(year%100!=0) ¦ ¦(year%400==0)) //if((year%4==0)&&(year%100!==0) ¦ ¦(year%400==0))
printf("the year %d is a leap year!",year);
else printf("the year %d is not a leap year!",year);
}
#include <stdio.h>
#include <math.h>
void main()
{
int year;
printf("please input a year:\n");
scanf("%d",&year);
if((year%4==0)&&(year%100!=0) ¦ ¦(year%400==0)) //if((year%4==0)&&(year%100!==0) ¦ ¦(year%400==0))
printf("the year %d is a leap year!",year);
else printf("the year %d is not a leap year!",year);
}
¦ ¦----> ||
#include <stdio.h>
#include <math.h>
void main()
{
int year;
printf("please input a year:\n");
scanf("%d",&year);
if((year%4==0)&&(year%100!=0)||(year%400==0)) //if((year%4==0)&&(year%100!==0) ¦ ¦(year%400==0))
printf("the year %d is a leap year!",year);
else printf("the year %d is not a leap year!",year);
}