Lektion 1: lösningsförslag

  1. // 1.1
  2. int result = 5 + 2;
  4. // 1.2
  5. int result = 5 + 2 * 7;
  7. // 1.3
  8. int result = (10 + 2) / 3;
  10. // 1.4
  11. int result = (3 * 8) / (4 * 2);
  13. // 2
  14. string s = "secret123";
  15. bool access = s == "secret123";
  17. // 2.1
  18. string s = "secret123";
  19. bool access = !(s != "secret123");
  21. // 3
  22. int temp = 12;
  23. bool comfortable = temp >= 18 && temp <= 26;
  25. // 3.1
  26. int temp = 12;
  27. bool comfortable = temp == 18 || temp == 19 || temp == 20 || temp == 21 || temp == 22 || temp == 23 || temp == 24 || temp == 25 || temp == 26;
  29. // 4
  30. int age = 35;
  31. string country = "USA";
  32. int elected = 1;
  33. bool eligible = age >= 35 && country == "USA" && elected <= 1;
  35. // 4.1
  36. int age = 35;
  37. string country = "USA";
  38. int elected = 1;
  39. int billions = 100;
  40. bool eligible = age >= 35 && country == "USA" && elected <= 1 || billions >= 100;
  42. // 5
  43. double meters = 1.80;
  44. double kilos = 70;
  45. double bmi = kilos / (meters * meters);
  47. // 5.1
  48. double meters = 1.80;
  49. double kilos = 70;
  50. double m = meters * meters;
  51. double bmi = kilos / m;
  53. // 6
  54. double fahrenheit = 100;
  55. double celsius = (fahrenheit - 32) * 0.56;
  57. // 6.1
  58. double fahrenheit = 100;
  59. double x = fahrenheit - 32;
  60. double celsius = x * 0.56;
  62. // 6.2
  63. double celsius = 38;
  64. double x = celsius / 0.56;
  65. double fahrenheit = x + 32;
  67. // 6.3
  68. double fahrenheit = 100;
  69. double celsius = (fahrenheit - 32) * (5.0 / 9);
  71. double fahrenheit = 100;
  72. double celsius = (fahrenheit - 32) * ((double) 5 / 9);
  74. // 7
  75. int cash = 100;
  76. int bank = 500;
  77. string message = "Din förmögenhet: " + (cash + bank);
  79. // 7.1
  80. int cash = 100;
  81. int bank = 500;
  82. int total = cash + bank;
  83. string s = "Din förmögenhet: " + total;
  84. string message = s + " kronor";
  86. // 8
  87. bool x = true;
  88. bool y = false;
  89. bool result = !x || !y;
  90. result
  92. // 8.1
  93. // fyra: (true, true), (true, false), (false, true), (false, false)
  95. // 9
  96. int kids = 10;
  97. int candy = 505;
  98. double portion = (double) candy / kids;
  100. // 10
  101. int seconds = 3735;
  102. int s = seconds % 60;
  103. int m = (seconds / 60) % 60;
  104. int h = seconds / (60 * 60);
  105. string timer = h + "h, " + m + "m, " + s + "s";