// ################################################################################//// name:          utils.cc//// author:        Martin Pelikan//// purpose:       functions use elsewhere for swapping values of the variables//                of various data types, and some more miscellaneous utils//// last modified: February 1999//// #################################################################################include <stdio.h>#include "utils.h"// ================================================================================//// name:          swapInt//// function:      swaps the two integers//// parameters:    a............a pointer to the first number to exchange//                b............a pointer to the second number to exchange//// returns:       (int) 0//// ================================================================================int swapInt(int *a, int *b){  int aux;    aux = *a;  *a  = *b;  *b  = aux;  return 0;};// ================================================================================//// name:          swapLong//// function:      swaps the two long integers//// parameters:    a............a pointer to the first number to exchange//                b............a pointer to the second number to exchange//// returns:       (int) 0//// ================================================================================int swapLong(long *a, long *b){  long aux;    aux = *a;  *a  = *b;  *b  = aux;  return 0;};// ================================================================================//// name:          swapPointers//// function:      swaps the two pointers//// parameters:    a............a pointer to the first pointer to exchange//                b............a pointer to the second pointer to exchange//// returns:       (int) 0//// ================================================================================void swapPointers(void **a, void **b){  void *aux;  aux = *a;  *a  = *b;  *b  = aux;}// ================================================================================//// name:          printSpaces//// function:      prints out a certain number of spaces//// parameters:    out..........a pointer to the output stream//                num..........a number of spaces to print out//// returns:       (int) 0//// ================================================================================int printSpaces(FILE *out, int num){  int i;   for (i=0; i<num; i++)    fputc(' ',out);  return 0;};