[user02@FC4 Lesson11]$ cat -n swapvals.cpp

   1  #include <iostream>
   2  using namespace std;
   3
   4  void swap_values(float *a, float *b)

   5  {
   6     float temp;
   7
   8     temp = *a;
   9     *a = *b;
  10     *b = temp;
  11  }
  12
  13  int main()
  14  {
  15     float big = 10000.0;
  16     float small = 0.00001;
  17
  18     swap_values(&big, &small);
  19
  20     cout << "Big contains " << big << endl;
  21     cout << "Small contains " << small << endl;
  22
  23     return 0;
  24  }

[user02@FC4 Lesson11]$ g++ -o swapvals swapvals.cpp
[user02@FC4 Lesson11]$ ./swapvals
Big contains 1e-05
Small contains 10000
[user02@FC4 Lesson11]$