Program to validate date, month and year

Program:

#include<stdio.h>

void main()

{

int dt,mnth,yr;

printf("Enter date,month and year: ");

scanf("%d%d%d",&dt,&mnth,&yr);

if(yr<1||sizeof(yr)>2)

{

printf("Please enter appropriate year!!!");

}

else if(mnth<1||mnth>12)

{

printf("Please enter appropriate month!!!");

}

else if(dt<1 || dt>31)

{

printf("Please enter appropriate date!!!");

}

else if(dt==31&&mnth==8)

{

printf("Date is Valid!!!");

}

else if(dt==29&&mnth==2&&(yr%4==0))

{

printf("Date is Valid!!!");

}

else if(dt==29&&mnth==2&&(yr%4!=0))

{

printf("Please enter appropriate date!!!");

}

else if(dt==30&&mnth==2)

{

printf("Please enter appropriate date!!!");

}

else if(dt>30&&(mnth)%2==0)

{

printf("Please enter appropriate date!!!");

}

else

{

printf("Date is Valid!!!");

}

}






Output:

April does not has 31 days

Year can't be negative.

Month can't be negative.

Date can't be negative.

Non-leap year's February does not has 29 days.

Leap year's February does not has 29 days.