Thread: Need Help.

I wrote the following Program.

Code:

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
#include<dos.h>


void even_odd();
void prime_number();
void leap_year();


void main()
{
	clrscr();
	int choice;


	while(1)
	{
		gotoxy(5,1);	printf("-------------------");
		gotoxy(5,2);	printf("Menu Driven Program");
		gotoxy(5,3);	printf("-------------------");
		gotoxy(5,5);	printf("1.Even or Odd");
		gotoxy(5,6);	printf("2.Prime or Not");
		gotoxy(5,7);	printf("3.Leap year or Not");
		gotoxy(5,8);	printf("4.Exit");


		printf("\n\n\tEnter Your Choice :");
		scanf("%d",&choice);


		switch( choice )
		{
			case 1 :
						even_odd();
						delay(200);
						clrscr();
						break;


			case 2 :
						prime_number();
						delay(200);
						clrscr();
						break;
			case 3 :
						leap_year();
						delay(200);
						clrscr();
						break;
			case 4 :
						exit(1);
		}
	}
}
void even_odd()
{
	int number;


	printf("\n\tEnter number :");
	scanf("%d",&number);


	if( number %2 == 0)
		printf("\n\t%d is an even number.",number);
	else
		printf("\n\t%d is an odd number.",number);


	getch();
}
void prime_number()
{
	int i,num;
	printf("\n\tEnter the number :");
	scanf("%d",&num);


	for(i=2;i<=(num-1);)
	{
		if(!(num%i==0))
			i++;
		else
		{
			printf("\n\tNot a Prime Number");
			break;
		}
	}
	if(i==num)
		printf("\n\tIt is a prime number");
	getch();
}
void leap_year()
{
	int year;


	printf("\n\tEnter a year to check if it is a leap year :");
	scanf("%d", &year);


	if ( year%100 == 0)
	{
		if ( year%400 == 0)
			printf("\n\t%d is a leap year.\n", year);
		else
			printf("%\n\td is not a leap year.\n", year);
	}
	else
	{
		if ( year%4 == 0 )
			printf("\n\t%d is a leap year.", year);
		else
			printf("\n\t%d is not a leap year.", year);
	}
	getch();


}

I want some questions to be answer for practical purpose.Pls tell me.


1.Objective-need
2.Problem definition
3.Research Methodology-How to ran program
4.Limitation-4 points.


pls tell me.Tnku.

Posted here too -> https://sg.answers.yahoo.com/questio...1054358AAiDPAJ

Some reading: FAQ > main() / void main() / int main() / int main(void) / int main(int argc, char *argv[]) - Cprogramming.com