/* 060208-4.c
 * 3 min
 */
#include <stdio.h>
#include <string.h>

void strinv (char str[]);

char str1 [] = "Hola rapaz";

int main (void)
{
  printf ("Cadena: %s\n", str1);
  strinv (str1);
  printf ("Invertida: %s\n", str1);

  return 0;
}

/* Respuesta 4) */
void strinv (char str[])
{
  int i, n;
  char tmp;

  n = strlen (str) - 1;
  for (i = 0; i < n; i++, n--) {
    tmp = str[i];
    str[i] = str[n];
    str[n] = tmp;
  }
}