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  1. import java.util.Random;
  2. import java.util.Scanner;
  3.  
  4. public class Main {
  5. 	public static void main(String[] args) {
  6. 		int num1 = 0, num2 = 0, total = 0, option = 0, ex; // Creates integer variables
  7. 		do {
  8. 			Scanner sc = new Scanner(System.in);
  9. 			System.out.println("\tBasic Math Calculator");// Title
  10. 			System.out.println("\t---------------------");
  11. 			System.out.println("\tEnter your choice from the following menu:");
  12. 			System.out.println("\t------------------------------------------");
  13. 			System.out.println("1.\tAddition");// All the menu options
  14. 			System.out.println("2.\tSubtraction");
  15. 			System.out.println("3.\tMultiplication");
  16. 			System.out.println("4.\tDivision");
  17. 			System.out.println("5.\tGenerate Random number");
  18. 			System.out.println("6.\tQuit");
  19.  
  20. 			boolean valid;
  21. 			do {
  22. 				valid = true;
  23. 				try {
  24. 					option = Integer.parseInt(sc.nextLine());// Stores the users answers
  25. 					if (option < 1 || option > 6) {
  26. 						System.out.println("Invalid input. Please try again.");
  27. 						valid = false;
  28. 					}
  29. 				} catch (NumberFormatException e) {
  30. 					System.out.println("Invalid input. Please try again.");
  31. 					valid = false;
  32. 				}
  33. 			} while (!valid);
  34.  
  35. 			switch (option) {// The math and titles for every option
  36. 			case 1:
  37. 				System.out.println("You chose to add two numbers: ");
  38. 				System.out.println("Enter your first number:");
  39. 				num1 = sc.nextInt();
  40. 				System.out.println("Enter your second number:");
  41. 				num2 = sc.nextInt();
  42. 				total = num1 + num2;
  43. 				System.out.println("The two numbers you chose added together is " + total);
  44. 				break;
  45. 			case 2:
  46. 				System.out.println("You chose to subtract two numbers: ");
  47. 				System.out.println("Enter your first number:");
  48. 				num1 = sc.nextInt();
  49. 				System.out.println("Enter your second number:");
  50. 				num2 = sc.nextInt();
  51. 				total = num1 - num2;
  52. 				System.out.println("The two numbers you chose subtracted together is " + total);
  53. 				break;
  54. 			case 3:
  55. 				System.out.println("You chose to multiply two numbers: ");
  56. 				System.out.println("Enter your first number:");
  57. 				num1 = sc.nextInt();
  58. 				System.out.println("Enter your second number:");
  59. 				num2 = sc.nextInt();
  60. 				total = num1 * num2;
  61. 				System.out.println("The two numbers you chose multiplied together is " + total);
  62. 				break;
  63. 			case 4:
  64. 				System.out.println("You chose to divide two numbers: ");
  65. 				System.out.println("Enter your first number:");
  66. 				num1 = sc.nextInt();
  67. 				System.out.println("Enter your second number:");
  68. 				num2 = sc.nextInt();
  69. 				total = num1 / num2;
  70. 				if (num2 == 0) {
  71. 					System.out.println("You can't divide by 0");
  72. 				} else {
  73. 					System.out.println("The two numbers you chose divided together is " + total + "with a quotient of "
  74. 							+ (num1 % num2));
  75. 				}
  76. 				break;
  77. 			case 5:
  78. 				System.out.println("You chose to get two random numbers: ");
  79. 				System.out.println("Enter your lower limit:");
  80. 				num1 = sc.nextInt();
  81. 				System.out.println("Enter your upper limit:");
  82. 				num2 = sc.nextInt();
  83. 				total = num1 + num2;
  84. 				Random rand = new Random();
  85. 				int rand_int1 = rand.nextInt(num1 + num2);
  86. 				System.out.println("The random intigers is: " + rand_int1);
  87. 				break;
  88. 			case 6:// If the user wants to quit
  89. 				ex = 2;
  90. 				break;
  91. 			default:// Tells their option was incorrect
  92. 				System.out.println("Invalid choice, choice " + option + " was not an option");
  93.  
  94. 			}
  95. 			System.out.println("Do you want to continue?1.Yes 2.No");// Asks the user if they want to proceed
  96. 			ex = sc.nextInt(); // A thank you message for the user for running the program
  97. 		} while (ex == 1);
  98. 		System.out.println("-----------------------------------------");
  99. 		System.out.println("Thank you for using the basic calculator!");
  100. 	}
  101. }
Runtime error #stdin #stdout #stderr 0.14s 35464KB
comments (?)
stdin 
Standard input is empty
stdout 
	Basic Math Calculator
	---------------------
	Enter your choice from the following menu:
	------------------------------------------
1.	Addition
2.	Subtraction
3.	Multiplication
4.	Division
5.	Generate Random number
6.	Quit
stderr 
Exception in thread "main" java.util.NoSuchElementException: No line found
	at java.base/java.util.Scanner.nextLine(Scanner.java:1651)
	at Main.main(Main.java:24)
https://ideone.com/cpbohN
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

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