Tests/Tutorial/Step3/tutorial.cxx

   1 // A simple program that computes the square root of a number
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <math.h>
   5 #include "TutorialConfig.h"
   6
   7 #ifdef USE_MYMATH
   8 #include "MathFunctions.h"
   9 #endif
  10
  11 int main (int argc, char *argv[])
  12 {
  13   if (argc < 2)
  14     {
  15     fprintf(stdout,"%s Version %d.%d\n",
  16             argv[0],
  17             Tutorial_VERSION_MAJOR,
  18             Tutorial_VERSION_MINOR);
  19     fprintf(stdout,"Usage: %s number\n",argv[0]);
  20     return 1;
  21     }
  22
  23   double inputValue = atof(argv[1]);
  24
  25 #ifdef USE_MYMATH
  26   double outputValue = mysqrt(inputValue);
  27 #else
  28   double outputValue = sqrt(inputValue);
  29 #endif
  30
  31   fprintf(stdout,"The square root of %g is %g\n",
  32           inputValue, outputValue);
  33   return 0;
  34 }