#include<stdio.h>

#include<conio.h>

void main()

{

int add(),sub(),mult(),div();

int o;

while(1)

{

clrscr();

printf("\nEnter the operator\nHINT\n----\n1 for +\n2 for -\n3 for *\n4 for /\n5 for exit");

scanf("%d",&o);

switch(o)

{

case 1:

add();

break;

case 2:

sub();

break;

case 3:

mult();

break;

case 4:

div();

break;

case 5:

exit(0);

}

}

}

int add()

{

int a,b,c;

printf("Enter the numbers");

scanf("%d%d",&a,&b);

c=a+b;

printf("%d + %d = %d",a,b,c);

getch();

return(0);

}

int sub()

{

       int a,b,c;

printf("Enter the numbers");

scanf("%d%d",&a,&b);

c=a-b;

printf("%d - %d= %d",a,b,c);

getch();

return(0);

}

int mult()

{

int a,b,c;

printf("Enter the numbers");

scanf("%d%d",&a,&b);

c=a*b;

printf("%d X %d = %d",a,b,c);

getch();

return(0);

}

int div()

{

int a,b,c;

printf("Enter the numbers");

scanf("%d%d",&a,&b);

c=a/b;

printf("%d / %d = %d",a,b,c);

getch();

return(0);

}