blob: b3c6a4f43cbae4d238eed610b08174579b3d2958 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
// A simple program that computes the square root of a number
#include <cmath>
#include <iostream>
#include <string>
#include "TutorialConfig.h"
// should we include the MathFunctions header?
#ifdef USE_MYMATH
# include "MathFunctions.h"
#endif
int main(int argc, char* argv[])
{
if (argc < 2) {
// report version
std::cout << argv[0] << " Version " << Tutorial_VERSION_MAJOR << "."
<< Tutorial_VERSION_MINOR << std::endl;
std::cout << "Usage: " << argv[0] << " number" << std::endl;
return 1;
}
// convert input to double
const double inputValue = std::stod(argv[1]);
// which square root function should we use?
#ifdef USE_MYMATH
const double outputValue = mysqrt(inputValue);
#else
const double outputValue = sqrt(inputValue);
#endif
std::cout << "The square root of " << inputValue << " is " << outputValue
<< std::endl;
return 0;
}
|
