Experiments-4

Write a menu driven program which has following options:

1. Factorial of a number.

2. Prime or not

3. Odd or even

4. Exit

#include<iostream.h>

#include<conio.h>

void main()

{

clrscr();

int num , ch , b=0,fact=1;

cout<<"To check wether number is Prime Press 1"<<endl;

cout<<"To check wether number is Even or Odd Press 2"<<endl;

cout<<"To get the factorial of a number press 3"<<endl;

cout<<"To exit press any other key"<<endl;

cout<<"Enter your choice: ";

cin>>ch;

if(ch==1){cout<<"Enter the number: ";

cin>>num;

for(int i = 1;i<num;i++)

{

if(b%i==0)

{

b=1;

}

}

if(b==1)

{

cout<<"The number is Prime";

}

Else

{

cout<<"The number is not Prime";

}

}

if(ch==2)

{

cout<<"Enter the number: ";

cin>>num;

if(num%2==0)

{

cout<<"The number is Even";

}

Else

{

cout<<"The number is Odd";

}

}

if(ch==3)

{

cout<<"Enter the number: ";

cin>>num;

for(int i = 1;i<=num;i++)

{

fact = fact*i;

}

cout<<"The factorial is: "<<fact;

}

getch();

}