Question

Write a complete program that
declares an integer variable,
reads a value from the keyboard into that variable, and
writes to standard output the square of the variable's value.

Answer 1

#include

int main(void)
{
   int num;
   printf("Enter the value of integer number : ");
   scanf("%d",&num);
   printf("\n%d %d %d",num,2*num,num*num); //num,2*num and num*num will be displayed
   return 0;
}

output:

Enter the value of integer number : 8
8 16 64