A Better Menu

#include <stdio.h> // for printf
#include <conio.h> // clrscr,getch
#include <stdlib.h> //exit function
// i like using this method of menus better then telling someone to enter 1 or 2 or 3 to do this and that
// all you gotta do is just press the button it tells you then the operation will execute
//******function proto-types*****
void sayabout();
void function1();
void function2();
void function3();
void yesorno();
void main()
{
int key = 0; // this is the varible that the keycode will be stored in
sayabout(); // call sayabout
getch(); // wait for key to be pressed
clrscr(); // clears screen
printf("Menu\n\r"); // displays the menu
printf("1: call function 1\n\r");
printf("2: call function 2\n\r");
printf("3: call function 3\n\r");
printf("ESC to exit.\n\r");
do // does a loop while they ESC key is not pressed
{
// if any key other then 1 2 3 or ESC is pressed it will do nothing and just keep looping until one of those keys is pressed
key = getch(); // keycode stored into key 
// if 1 is pressed 
if (key==49)
{
function1(); // call function1
break; // stop the loop
}
else
// if 2 is pressed
if (key==50)
{
function2();
break;
}
else
// if 3 is pressed
if (key==51)
{
function3();
break;
}
} while (key != 27); // if ESC is pressed then stop the loop
key = 0;
printf("press any key to continue....\n\r");
getch();
}
// *****declaranation of functions****
void sayabout()
{
clrscr();
printf("This is my example of A Better Menu.\n\r");
printf("This menu uses the getch function insted of the cin function.\n\r");
printf("In my personal opinion this is better then using cin =]\n\r");
printf("press any key to continue.......\n\r");
}
void function1()
{
printf("You've choosed option 1\n\r");
yesorno(); // call yesorno function
}
void function2()
{
printf("You've choosed option 2\n\r");
yesorno();
}
void function3()
{
printf("You've choosed option 3\n\r");
yesorno();
}
void yesorno() // the function name says it all
{
int keyy = 0; // keycode stored in varible
printf("Would you like to try again? (Y/N) \n\r");
do
{
keyy = getch();
// if y or Y is pressed then call the main function
if (keyy == 98 || keyy == 121)
main();
else
// if n or N is pressed then exit the program completely
if (keyy == 110 || keyy == 78) {
keyy = 0;
exit(-1); // exit function ends the program completely ((love this function))
}
} while (1);
}