CMake/Tests/Tutorial/Step7/tutorial.cxx

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// A simple program that computes the square root of a number
#include "TutorialConfig.h"
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef USE_MYMATH
#include "MathFunctions.h"
#endif
int main (int argc, char *argv[])
{
if (argc < 2)
{
fprintf(stdout,"%s Version %d.%d\n",
argv[0],
Tutorial_VERSION_MAJOR,
Tutorial_VERSION_MINOR);
fprintf(stdout,"Usage: %s number\n",argv[0]);
return 1;
}
double inputValue = atof(argv[1]);
double outputValue = 0;
if(inputValue >= 0)
{
#ifdef USE_MYMATH
outputValue = mysqrt(inputValue);
#else
outputValue = sqrt(inputValue);
#endif
}
fprintf(stdout,"The square root of %g is %g\n",
inputValue, outputValue);
return 0;
}