C Program for All Basic Arithematic Operations...(Mini-Calculator)

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

int addition(int,int);
int subst(int,int);
int multiplication(int,int );
int divid(int,int);
int modulus(int,int);
int temp;

void main()
{
int v1,v2,ch,i,sum;
i=66;
do
{
clrscr();
printf("-Wel come to the world of Jax -\n");
hello :
printf("\nPlease Enter the First value");
scanf("%d",&v1);
printf("\nPlease Enter the Second value");
scanf("%d",&v2);

printf("\nPlease enter the mode of operation\n");
printf("\nPress 1 for  Addition");
printf("\nPress 2 for  Sub");
printf("\nPress 3 for  Devidsion");
printf("\nPress 4 for  Mul");
printf("\nPress 5 for  Mod\n\n");

scanf("%d",&ch);
switch(ch)
{
case 1:
    sum=addition(v1,v2);
    printf("\nThe Sum of values is :->%d",sum);
    break;
case 2:
    sum=subst(v1,v2);
    printf("\nThe Subtraction of values is :->%d",sum);

break;
case 3:
    sum=divid(v1,v2);
    printf("\nThe Division of values is :->%d",sum);
    break;
case 4:
    sum=multiplication(v1,v2);
    printf("\nThe Multiplication of values is :->%d",sum);
    break;
case 5:
    sum=modulus(v1,v2);
    printf("\nThe Modulus of values is :->%d",sum);
    break;
default:
    printf("\nYou Entered a Wrong choise\n ");
    getch();
    clrscr();
    goto hello;
}



printf("\nIf u wana Continue then press 11");
printf("\nIf u wana Exit then press 0");


scanf("%d",&i);
if (i==0)
{
printf("Thanks for using our calci have a very nice time");
}
}while(i>0);
getch();
}

int addition(int p,int q)
{
temp=p+q;
return(temp);
}
int subst(int p,int q)
{
temp=p-q;
return(temp);
}
int multiplication(int p,int q)
{
temp=p*q;
return(temp);
}
int divid(int p,int q)
{
return(p/q);
}
int modulus(int p,int q)
{
temp=p%q;
return(temp);
}