1. using System; 2. 3. class AirlineResevationSystem 4. { 5. static void Main() 6. { 7. int seatsFirst, seatsEconomy, reserve, i = 0, j = 6; 8. bool[] seats = { false, false, false, false, false, 9. false, false, false, false, false }; // seating chart 10. Console.WriteLine("Welcome to Airline Reservation System."); // greet the user 11. 12. while (true) 13. { 14. Console.WriteLine("There are " + checkFirstClass(out seatsFirst, seats) + " first class seats and " + checkEconomy(out seatsEconomy, seats) + " economy seats."); // check available seats 15. Console.WriteLine("Please enter 1 to reserve a first class seat or enter 2 to reserve an economy class seat or 0 to exit"); // promt user for input 16. reserve = Convert.ToInt32(Console.ReadLine()); // input from user 17. if (reserve == 1) 18. { 19. if (i > 5 || i == 5) 20. { 21. Console.WriteLine("There are no first class seats available. Would you like an economy class seat? Type 2 for yes and 0 to exit."); 22. reserve = Convert.ToInt32(Console.ReadLine()); // RIGHT HERE I WOULD LIKE THE PROGRAM TO GO BACK TO THE INITIAL IF STATEMENT AND CHECK THE CONDITIONS. ANY ADVICE? 23. } 24. else reserveFirstSeat(ref seats, ref i); // reserve first class seat 25. } 26. else if (reserve == 2) 27. { 28. if (j < 5 || j > 10) 29. { 30. Console.WriteLine("There are no economy seats available. Would you like a first class seat? Type 1 for yes and 0 to exit."); 31. reserve = Convert.ToInt32(Console.ReadLine()); // RIGHT HERE I WOULD LIKE THE PROGRAM TO GO BACK TO THE INITIAL IF STATEMENT AND CHECK THE CONDITIONS. ANY ADVICE? 32. } 33. else reserveEconomySeat(ref seats, ref j); // reserve economy class seat 34. } 35. else if (reserve == 0) 36. { 37. Console.WriteLine("Next flight leaves in three hours."); // ALSO, I WANT TO ADD HOW MANY FIRST CLASS TICKETS WERE RESERVED IF ANY AND SAME THING FOR ECONO CLASS BUT I'M NOT SURE HOW TO KEEP TRACK OF IT. ANY ADVICE? 38. break; 39. } 40. else 41. { 42. Console.WriteLine("Invalid entry. Please try again"); 43. } 44. 45. 46. } 47. } 48. 49. 50. 51. public static int checkFirstClass (out int seatsFirst, bool [] seats) // method to check available First Class seats 52. { 53. seatsFirst = 0; 54. for (int i = 0; i<5; i++) 55. { 56. if (seats[i] == false) 57. seatsFirst++; 58. } 59. 60. return seatsFirst; 61. } 62. 63. public static int checkEconomy (out int seatsEconomy, bool [] seats) // method to check available Economy seats 64. { 65. seatsEconomy = 0; 66. for (int i = 5; i<10; i++) 67. { 68. if (seats[i] == false) 69. seatsEconomy++; 70. } 71. 72. return seatsEconomy; 73. } 74. 75. public static void reserveFirstSeat (ref bool [] seats, ref int i) // reserve selected first class seat 76. { 77. 78. 79. if (i<5) 80. { 81. if (seats[i] == false) 82. { 83. seats[i] = true; 84. Console.WriteLine("You have successfully reserved a first class seat"); 85. } 86. } 87. ++i; 88. 89. } 90. 91. public static void reserveEconomySeat (ref bool [] seats, ref int j) // reserve selected economy class seat 92. { 93. if (j > 5 || j == 5 || j<10) 94. { 95. if (seats[j] == false) 96. { 97. seats[j] = true; 98. Console.WriteLine("You have successfully reserved an economy class seat"); 99. 100. } 101. } 102. ++j; 103. 104. } 105. }