The document discusses different conditional and looping structures in C++ including if/else statements, switch statements, while loops, do-while loops, and for loops. It provides examples of a function called accept that uses these structures to prompt the user for input and return true if they enter 'y' or false otherwise, allowing for multiple tries.

2. ‫شرطی‬ ‫ساختارهای‬
‫حلقه‬ ‫و‬ ‫تکرار‬ ‫ساختارهای‬

3.  if ( Condition ) Statement
 if ( Condition ) Statement else Statement
 switch ( Condition )
 case Constant Expression: Statement
 …
 default: Statement

4. 1. bool accept()
2. {
3. // Write question
4. cout << "Do you want to proceed (y or n)?n";
5.
6. char answer = 0;
7. cin >> answer; // Read answer
8.
9. if (answer == 'y')
10. return true;
11.
12. return false;
13. }

5. 1. bool accept()
2. {
3. // Write question
4. cout << "Do you want to proceed (y or n)?n";
5.
6. char answer = 0;
7. cin >> answer; // Read answer
8.
9. if (answer == 'y')
10. return true;
11.
12. return false;
13. }

6. 1. bool accept2()
2. {
3. // Write question
4. cout << "Do you want to proceed (y or n)?n";
5.
6. char answer = 0;
7. cin >> answer; // Read answer
8.
9. switch (answer)
10. {
11. case 'y':
12. return true;
13. case 'n':
14. return false;
15. default:
16. cout << "I'll take that for a no.n";
17. return false;
18. }
19. }

7.  while ( Condition ) Statement
 do Statement while ( Condition);
 for (Initialize; Condition; Expression)
Statement

8. 1. bool accept3()
2. {
3. int tries = 1;
4. while (tries < 4)
5. {
6. // Write question
7. cout << "Do you want to proceed (y or n)?n";
8.
9. char answer = 0;
10. cin >> answer; // Read answer
11.
12. switch (answer)
13. {
14. case 'y':
15. return true;
16. case 'n':
17. return false;
18. default:
19. cout << "Sorry, I don't understand that.n";
20. ++tries; // Increment
21. }
22. }
23. cout << "I'll take that for a no.n";
24. return false;
25. }

9. 1. bool accept4()
2. {
3. for (int tries = 1; tries<4; ++tries)
4. {
5. // Write question
6. cout << "Do you want to proceed (y or n)?n";
7.
8. char answer = 0;
9. cin >> answer; // Read answer
10.
11. switch (answer)
12. {
13. case 'y':
14. return true;
15. case 'n':
16. return false;
17. default:
18. cout << "Sorry, I don't understand that.n";
19. }
20. }
21. cout << "I'll take that for a no.n";
22. return false;
23. }