Hi! I'm new to C program and my prof gave me this problem Can anybody help me out.

Ok, she wants an output like the one below

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Main Menu

[1] Addition

[2] Subtraction

[3] Multiplication

[4] Divison

Enter your choice: __

-2nd page/another screen

Addition

Enter Number 1 :

Enter Number 2 :

The Sum is _

Try Again? [y][n]

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i should use do while and switch case

and here's what i made

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#include<stdio.h>

#define p printf

#define g gotoxy

#define s scanf

main()

{

char oper,addition,subtraction,multiplication,division;

int num1,num2,total,ch;

clrscr();

g(33,3);p("MAIN MENU");

g(25,5);p("[1] Addition");

g(25,6);p("[2] Subtraction");

g(25,7);p("[3] Multiplication");

g(25,8);p("[4] Division");

g(25,10);p("Enter Your Choice");

do

{

g(25,11);ch=getche();

getche();

}

while(ch!='1' && ch!='2' && ch!='3' && ch!='4');

switch(ch)

{

case '1': oper=addition;

break;

case '2': ch=num1-num2;

oper=subtraction;

break;

case '3': ch=num1*num2;

oper=multiplication;

break;

case '4': ch=num1/num2;

oper=division;

break;

}

clrscr();

g(30,3);p("%s",oper);

g(15,5);p("Number 1 : ");

s("%d",num1);

g(15,6);p("Number 2 : ");

s("%d",num2);

g(15,7);p("Total is %d",ch);

getch();

return 0;

}

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But it doesn't work. What could be wrong in my program?To anyone who replies, thanks in advance!