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C & C++ Multimedia Cyber Classroom
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C and C++ Multimedia Cyber Classroom (Prentice Hall) (1998).iso
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cpphtp2
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code.jar
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code
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ch07
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fig07_03.txt
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1998-02-27
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45 lines
1 // Fig. 7.3: fig07_03.cpp
2 // Attempting to initialize a constant of
3 // a built-in data type with an assignment.
4 #include <iostream.h>
5
6 class Increment {
7 public:
8 Increment( int c = 0, int i = 1 );
9 void addIncrement() { count += increment; }
10 void print() const;
11 private:
12 int count;
13 const int increment;
14 };
15
16 // Constructor for class Increment
17 Increment::Increment( int c, int i )
18 { // Constant member 'increment' is not initialized
19 count = c;
20 increment = i; // ERROR: Cannot modify a const object
21 }
22
23 // Print the data
24 void Increment::print() const
25 {
26 cout << "count = " << count
27 << ", increment = " << increment << endl;
28 }
29
30 int main()
31 {
32 Increment value( 10, 5 );
33
34 cout << "Before incrementing: ";
35 value.print();
36
37 for ( int j = 0; j < 3; j++ ) {
38 value.addIncrement();
39 cout << "After increment " << j << ": ";
40 value.print();
41 }
42
43 return 0;
44 }