Question 20 This program does not compile! Spot the error and give the line number(s) 1. #include 2. using namespace std; 3. class Demo { 4. public: 5. Demo(); }; 6.::Demo() { 7. cout << "Welcome"; } // Function main. 8. int main() { 9.Demo demoObject(0); // Define a Demo object; 10. cout << "This program demonstrates an object\n"; 11. cout << " being created"; 12. return 0; } O Line 6,9 O Line 6 Line 9 ****** O No Error, the program should work
Question 20 This program does not compile! Spot the error and give the line number(s) 1. #include 2. using namespace std; 3. class Demo { 4. public: 5. Demo(); }; 6.::Demo() { 7. cout << "Welcome"; } // Function main. 8. int main() { 9.Demo demoObject(0); // Define a Demo object; 10. cout << "This program demonstrates an object\n"; 11. cout << " being created"; 12. return 0; } O Line 6,9 O Line 6 Line 9 ****** O No Error, the program should work
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Transcribed Image Text:**Question 20**
**This program does not compile! Spot the error and give the line number(s):**
```cpp
1. #include <iostream>
2. using namespace std;
3. class Demo
4. {
5. public:
6. Demo();
7. };
8. ::Demo()
9. {
10. cout << "Welcome ";
11. }
12. // ********************************************
13. // Function main. *
14. // ********************************************
15. int main()
16. {
17. Demo demoObject(0); // Define a Demo object;
18. cout << "This program demonstrates an object\n";
19. cout << " being created";
20. return 0;
21. }
```
- O Line 6,9
- O Line 6
- O Line 9
- O No Error, the program should work
**Explanation:**
The problem appears to be related to line 17, where the `Demo` object is initialized with a parameter `(0)`, but the constructor `Demo()` defined in line 6 does not take any arguments. This leads to a mismatch and the reason for the compilation error.
To fix the error:
- Either modify the constructor to accept an integer parameter.
- Or, remove the parameter `(0)` when creating the `Demo` object in the main function.
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