program to find the area of square in c++

#include<iostream.h>
#include<conio.h>
int main()
{
clrscr();
int a,square;
cout<<"enter the value a:";
cin>>a;
square= a * a;
cout<<"the required area of square is:";
cout<<square;
getch();
return(0);
}

https://www.youtube.com/watch?v=ykTaoik98yo