Question

I want a c program which ask for Hexadecimal number and gives output equivalent octal number. I use the code to convert int into octal using printf() function.

#include<stdio.h>
Void main(){
  int i;
  printf("Enter the Hax number: ");
  scanf("%x",&i);
  printf("Octal equivalent of number is %o",i);
}

Answer 1

Hexadecimal and Octal are just different representations of the same underlying number format. ie binary. So no conversion is really happening in your example. Its just that you are interpreting/printing the same number in 2 different ways. And printf is indeed doing a good job in your example

Enter the Hax number: FF
Octal equivalent of number is 377

The only other problematic thing I can see is Void main 🙂