CMake/Tests/Tutorial/Step4/tutorial.cxx

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