// scanf example 
// source: http://www.cplusplus.com/

#include <stdio.h>
#include <stdlib.h>

#define SIZE 80

int main()
{
  char str[SIZE];
  int i;

  printf("Enter your family name: ");
  scanf("%79s", str);  
  printf("Enter your age: ");
  scanf("%d", &i);
  printf("%s, %d years old.\n", str, i);
  printf("Enter a hexadecimal number: ");
  scanf("%x", (unsigned int *)&i);
  printf("You have entered %#x (%d).\n", i, i);
  
  return EXIT_SUCCESS;
}