FazBrowse GitHub Viewer | Trending | | Home

Tools: [Download Repo ZIP] [View Raw Code] [Original HTTPS Page]

cpp-tutorials/015-ptr-vs-ref-for-output/main.cpp at main · SuboptimalEng/cpp-tutorials · GitHub

80 lines (68 loc) · 1.6 KB

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

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

#include <stdlib.h>

#include <iostream>

int sum(int& a, int* b);

int sum(int& a, int* b) {

return a + *b;

}

void PrintText(std::string s) {

std::cout << "--- " << s << " ---" << std::endl;

}

void PrintVariables(int a, int b, int c) {

std::cout << std::endl;

std::cout << "a: " << a << std::endl;

std::cout << "b: " << b << std::endl;

std::cout << "c: " << c << std::endl;

std::cout << std::endl;

}

void PrintResult(int result) {

std::cout << "result -> " << result << std::endl;

}

int DoubleVarsAndAdd_v1(int a, int b, int c) {

a = a * 2;

b = b * 2;

c = c * 2;

return a + b + c;

}

// Should we rename this fn instead?

int DoubleVarsAndAdd_v2(int a, int b, int& c) {

a = a * 2;

b = b * 2;

c = c * 2;

return a + b + c;

}

int DoubleVarsAndAdd_v3(int a, int b, int* c) {

a = a * 2;

b = b * 2;

(*c) = (*c) * 2;

return a + b + (*c);

}

int main() {

// --- v1: Simple Example ---

// int a = 1;

// int b = 1;

// int c = 1;

// PrintText("Version 1");

// PrintVariables(a, b, c);

// int result_v1 = DoubleVarsAndAdd_v1(a, b, c);

// PrintResult(result_v1);

// PrintVariables(a, b, c);

// --- v2: Pass by Reference ---

// int a = 1;

// int b = 1;

// int c = 1;

// PrintText("Version 2");

// PrintVariables(a, b, c);

// int result_v2 = DoubleVarsAndAdd_v2(a, b, c);

// PrintResult(result_v2);

// PrintVariables(a, b, c);

// --- v3: Pass with Pointer ---

int a = 1;

int b = 1;

int c = 1;

PrintText("Version 3");

PrintVariables(a, b, c);

int result_v3 = DoubleVarsAndAdd_v3(a, b, &c);

PrintResult(result_v3);

PrintVariables(a, b, c);

return 0;

}

Back | FazBrowse Home | New Git URL