Question

All in C language...

Write a complete program that

• declares an integer variable,
• reads a value from the keyboard into that variable, and
• writes to standard output the variable's value, twice the value, and the square of the value, separated by spaces.

Besides the numbers, nothing else should be written to standard output except for spaces separating the values.

I got this... and it's wrong

#include<stdio.h>
int main()
{
int num;
scanf("%d", &num);
printf("%d %d %d",num,2*num,num*num);
return 0;
}

Answer 1

#include <stdio.h>

int main()
{
int number;

printf("Enter a number : ");

scanf("%d",&number); // reads a value from keyboard
  
printf("%d",number); // the variable's value
  
printf(" %d",2*number); //twice the value  & a space before %d
  
printf(" %d",number*number); // the square of the value & a space before %d

return 0;
}