fork download
copy 
  1.  
  2. #include <iostream>
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7. 	//// Sequence 
  8. 	//// 
  9. 	//// Student data
  10. 	//int studentID = 15;
  11. 	//int studentAge = 23;
  12. 	//double studentFee = 75.25;
  13. 	//char studentGrade = 'B';
  14.  
  15. 	//// Print variables
  16. 	//cout << "Student ID: " << studentID << "\n";
  17. 	//cout << "Student Age: " << studentAge << "\n";
  18. 	//cout << "Student Fee: " << studentFee << "\n";
  19. 	//cout << "Student Grade: " << studentGrade << "\n";
  20. 	// 
  21. 	//...................................................................//
  22. 	// 
  23. 	// Selection
  24. 	//..............................Example 1...........................//
  25. 	// 
  26. 	//int age = 20;
  27. 	//bool isCitizen = true;
  28.  
  29. 	//if (age >= 18) {
  30. 	//	cout << "Old enough to vote.\n";
  31.  
  32. 	//	if (isCitizen) {
  33. 	//		cout << "And you are a citizen, so you can vote!\n";
  34. 	//	}
  35. 	//	else {
  36. 	//		cout << "But you must be a citizen to vote.\n";
  37. 	//	}
  38. 	//}
  39. 	//else {
  40. 	//	cout << "Not old enough to vote.\n";
  41. 	//}
  42. 	//..............................Example 2...........................//
  43. 	//int day = 4;
  44. 	//switch (day) {
  45. 	//case 1:
  46. 	//	cout << "Monday";
  47. 	//	break;
  48. 	//case 2:
  49. 	//	cout << "Tuesday";
  50. 	//	break;
  51. 	//case 3:
  52. 	//	cout << "Wednesday";
  53. 	//	break;
  54. 	//case 4:
  55. 	//	cout << "Thursday";
  56. 	//	break;
  57. 	//case 5:
  58. 	//	cout << "Friday";
  59. 	//	break;
  60. 	//case 6:
  61. 	//	cout << "Saturday";
  62. 	//	break;
  63. 	//case 7:
  64. 	//	cout << "Sunday";
  65. 	//	break;
  66. 	//}
  67. 	//
  68. 	//...................................................................//
  69. 	// Iterations
  70. 	//..............................Example 1...........................//
  71. 	//int number = 2;
  72. 	//int i;
  73.  
  74. 	//// Print the multiplication table for the number 2
  75. 	//for (i = 1; i <= 10; i++) {
  76. 	//	cout << number << " x " << i << " = " << number * i << "\n";
  77. 	//}
  78. 	// 
  79. 	//..............................Example 2...........................//
  80. 	//for (int i = 1; i <= 3; i++) {
  81. 	//	for (int j = 1; j <= 3; j++) {
  82. 	//		cout << i * j << " ";
  83. 	//	}
  84. 	//	cout << "\n";
  85. 	//}
  86. 	// 
  87. 	// .........................good question.....................................//
  88. //predict the output of the following code
  89.  
  90. 	//int x = 3;
  91. 	//for (int i = 0; i < 3; i++) {
  92. 	//	if (x % 2 == 1)
  93. 	//		x += 2;
  94. 	//	else
  95. 	//		x++;
  96. 	//}
  97. 	//cout << x;
  98. 	// 
  99.     //................................Quiz...........................//
  100.  
  101. 	//Write code to print Sum of numbers from 1 to 10 using for loop:
  102.  
  103.  
  104. 	//int sum = 0;
  105. 	//for (int i = 1; i <= 10; i++) {
  106. 	//	sum = sum + i;
  107. 	//}
  108. 	//cout << sum << endl;
  109.  
  110. 	// but what if i want to Solve it without loops ?
  111.  
  112. 	//int num = 10,sum=0;
  113. 	//sum = num * (num + 1) / 2;
  114. 	//cout << sum;
  115.  
  116. 	//................................Arrays...........................//
  117.  
  118. 	//int myNumbers[5] = { 10, 20, 30, 40, 50 };
  119. 	//for (int i = 0; i < 5; i++) {
  120. 	//	cout << myNumbers[i] << "\n";
  121. 	//}
  122.  
  123. 	// //cout << sizeof(myNumbers) << endl;  // what is the result ?
  124.  
  125. 	//int getArrayLength = sizeof(myNumbers) / sizeof(myNumbers[0]);
  126. 	//cout << getArrayLength << endl;
  127. 	//cout << getArrayLength;
  128.  
  129. 	// ..............................The best way...........................//
  130.  
  131. 	//int myNumbers[5] = { 10, 20, 30, 40, 50 };
  132. 	//for (int num : myNumbers) {
  133. 	//	cout << num << "\n";
  134. 	//}
  135. 	// ..............................2D Arrays...........................//
  136.  
  137.  //      string letters[2][4] = {
  138.  //        { "A", "C", "D" , "G" }, {  }
  139.  //      };
  140.  
  141. 	//cout << letters[1][2];  //What is the result ?
  142.  
  143. 	// ..............................references...........................//
  144.  //   string food = "Pizza";
  145.  //   string& meal = food;
  146. 	//string& drink = meal;
  147.  
  148.  ////   cout << &food << "\n";  // Outputs ?
  149. 	////cout << &meal << "\n";  // Outputs ?
  150. 	////cout << &drink << "\n";  // Outputs ?
  151.  
  152.  
  153. 	//meal = "Hamburger";
  154. 	//cout << food << "\n";  // Outputs ?
  155.  
  156. 	// ..............................pointers.............................//
  157.  
  158.     string food = "Pizza";  // A food variable of type string
  159.     string* ptr = &food;    // A pointer variable, with the name ptr, that stores the address of food
  160.  
  161.     //Output the value of food (Pizza)
  162.     cout << food << "\n";
  163.  
  164.     //Output the memory address of food (0x6dfed4)
  165.     cout << ptr << "\n";
  166.  
  167.     // Output the memory address of food with the pointer (0x6dfed4)
  168.     //////cout << ptr << "\n";  //what if ( ,& ,* )?
  169.  
  170. }
Success #stdin #stdout 0s 5324KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Pizza
0x7ffe27f60b30
https://ideone.com/VwzpaK
language:
C++ (gcc 8.3)
created:
5 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!