Write a program that calculate the total sale of a shop take per unit price of the product , total sold unit and total discount

#include<iostream.h>

#include<conio.h>

void main()

{

clrscr();

long int tot_sale;

int q,p,dis;

cout<<"Enter the per unit price ::";

cin>>p;

cout<<"Enter the total sold quantity ::";

cin>>q;

cout<<"Enter the total discount ::";

cin>>dis;

tot_sale=(p*q)-dis;

cout<<"Total sale of a shop is "<<tot_sale;

getch();

}