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When Bjarne Stroustrup invented C++, he not only created a great programming language, but he created a great language that gave the programmer tremendous power. He also gave the programmer an entirely new set of ways of screwing up. Thanks to his effort all the programs in this chapter are possible.
Why does this program leak memory?
1 /************************************************
2 * play with a variable size stack class. *
3 ************************************************/
4
5 /************************************************
6 * stack -- Simple stack class *
7 * *
8 * Member functions: *
9 * push -- Push data on to the stack *
10 * pop -- remove an item from the stack. *
11 ************************************************/
12 class stack
13 {
14 private:
15 int *data; // The data
16 const int size; // The size of the data
17
18 // Number of items in the data
19 int count;
20 public:
21 // Create the stack
22 stack(
23 // Max size of the stack
24 const int _size
25 ):size(_size), count(0)
26 {
27 data = new int[size];
28 }
29 ~stack(void) {}
30 private:
31 // No copy constructor
32 stack(const stack &);
33
34 // No assignment operator
35 stack & operator = (const stack &);
36 public:
37 // Push something on the stack
38 void push(
39 // Value to put on stack
40 const int value
41 )
42 {
43 data[count] = value;
44 ++count;
45 }
46 // Remove an item from the stack
47 int pop(void)
48 {
49 --count;
50 return (data[count]);
51 }
52 };
53
54 int main()
55 {
56 stack a_stack(30);
57
58 a_stack.push(1);
59 a_stack.push(3);
60 a_stack.push(5);
61 a_stack.push(7);
62 return (0);
63 }
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