A Program in C using DO-WHILE Loop to find square of the number

Program code:

#include<stdio.h>
#include<conio.h>
int main()
{
int num,op;
//clrscr();
do
{
printf("enter a number:\n");
scanf("%d",&num);
printf("square root of %d is %d\n",num,num*num);
printf("want to try another number? \n(enter 1 for yes /0 for no)\n");
scanf("%d",&op);
}
while(op==1);
//getch();
return 0;
}

output:

enter a number:

2

square root of 2 is 4

want to try another number?

(enter 1 for yes/0 for no)

n