dev/c/cmake_tutorial/step3/tutorial.cxx

33 lines
780 B
C++

// A simple program that computes the square root of a number
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "TutorialConfig.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]);
#ifdef USE_MYMATH
puts ("Using mysqrt ()\n");
double outputValue = mysqrt(inputValue);
#else
puts ("Using system sqrt ()\n");
double outputValue = sqrt(inputValue);
#endif
fprintf(stdout,"The square root of %g is %g\n",
inputValue, outputValue);
return 0;
}