C++

1. 1#include [blank_start]<iostream>[blank_end]
   using namespace std;
   
   int main() {
   return 0;
   }

   1. A<iostream>
2. 2#include <iostream>
   [blank_start]using namespace std;[blank_end]
   
   int main() {
   return 0;
   }

   1. Ausing namespace std;
3. 3#include <iostream>
   using namespace std;
   
   int main() {
   cout [blank_start]<<"[blank_end]Hello World"<<endl;
   return 0;
   }

   1. A<<"
4. 4#include <iostream>
   using namespace std;
   
   [blank_start]int main()[blank_end] {
   return 0;
   }

   1. Aint main()
5. 5#include <iostream>
   using namespace std;
   
   int main() {
   cout << "Hello World! [blank_start]\n[blank_end]";
   return 0;
   }
   Line other than endl

   1. A\n
6. 6#include <iostream>
   using namespace std;
   
   int main() {
   [blank_start]//[blank_end]cout << "Hello World! \n";
   cout << "I am learning C++";
   return 0;
   }
   Comment out the first output line

   1. A//
7. 7#include <iostream>
   using namespace std;
   
   int main() {
   [blank_start]/*[blank_end]cout << "Hello World! \n\n";
   cout << "I am learning C++";*/
   return 0;
   }

   1. A/*
8. 8int myNum = 15; // myNum is 15
   myNum = 10;
   cout << myNum;
   OUTPUT:
   [blank_start]10[blank_end]

   1. A10
9. 9int x = 5;
   int y = 6;
   [blank_start]int[blank_end] sum = x + y;
   cout << sum;

   1. Aint
10. 10[blank_start]int[blank_end] x = 5, y = 6, z = 50;
    cout << x + y + z;

    1. Aint

11. 11You should always declare the variable as constant when you have values that are unlikely to change:
    [blank_start]const[blank_end] float PI = 3.14;

    1. Aconst
12. 12Take input from x:
    int x;
    cout << "Type a number: ";
    [blank_start]cin >> x[blank_end];
    cout << "Your number is: " << x;

    1. Acin>>x
13. 13Size of int

    1. A8
    2. B1
    3. C4
    4. D6
14. 14Size of double

    1. A4
    2. B8
    3. C1
    4. D2
15. 15Size of float

    1. A6
    2. B1
    3. C8
    4. D4
16. 16Size of char

    1. A4
    2. B8
    3. C2
    4. D1
17. 17Size of boolean

    1. A1
    2. B8
    3. C4
    4. D2
18. 18[blank_start]float[blank_end] myNum = 5.75;
    cout << myNum;

    1. Afloat
19. 19[blank_start]double[blank_end] myNum = 19.994434;
    cout << myNum;

    1. Adouble
20. 20[blank_start]int[blank_end] myNum = 1000;
    cout << myNum;

    1. Aint
21. 21bool isCodingFun = true;
    cout << isCodingFun;
    Output:
    [blank_start]1[blank_end]

    1. A1
22. 22bool isCodingFun = false;
    cout << isCodingFun;
    Output:
    [blank_start]0[blank_end]

    1. A0
23. 23[blank_start]char[blank_end] a = 65, b = 66, c = 67;
    cout << a;
    cout << b;
    cout << c;
    Output:
    ABC

    1. Achar
24. 24#include [blank_start]<string>[blank_end]
    string greeting = "Hello";
    cout << greeting;

    1. A<string>
25. 25Adds together two values
    x [blank_start]+[blank_end] y

    1. A+
26. 26Subtracts one value from another
    x [blank_start]-[blank_end] y

    1. A-
27. 27Multiplies two values
    x [blank_start]*[blank_end] y

    1. A*
28. 28Divides one value by another
    x [blank_start]/[blank_end] y

    1. A/
29. 29Returns the division remainder
    x [blank_start]%[blank_end] y

    1. A%
30. 30Increases the value of a variable by 1
    [blank_start]++x[blank_end]

    1. A++x
31. 31Decreases the value of a variable by 1
    [blank_start]--[blank_end]x

    1. A--
32. 32int x = 5;
    x[blank_start]+=[blank_end]3;
    cout << x << endl;
    Output:
    8

    1. A+=
33. 33int x = 5;
    x[blank_start]-=[blank_end]3;
    cout << x << endl;
    Output:
    2

    1. A-=
34. 34int x = 5;
    x[blank_start]*=[blank_end]3;
    cout << x << endl;
    Output:
    15

    1. A*=
35. 35int x = 5;
    x[blank_start]/=[blank_end]3;
    cout << x << endl;
    Output:
    1.6666

    1. A/=
36. 36int x = 5;
    x[blank_start]%=[blank_end]3;
    cout << x << endl;
    Output:
    2

    1. A%=
37. 37int x=5,y=2;
    x == y;
    x != y;
    x > y;
    x < y;
    x >= y;
    x <= y;

    1. Af,t,t,t,t,t
    2. Bf,f,t,t,f,f
    3. Ct,t,t,f,t,t
    4. Df,t,t,f,t,f
38. 38Returns true if both statements are true
    int x=4
    cout <<x < 5 [blank_start]&&[blank_end] x < 10<<endl;
    output:
    true

    1. A&&
39. 39 Returns true if one of the statements is true
    int x=6
    cout <<x < 5 || x < 10<<endl;
    output:
    [blank_start]true[blank_end]

    1. Atrue
40. 40Reverse the result, returns false if the result is true
    int x=3
    cout <<[blank_start]<<endl;
    output:
    false

    1. A!
41. 41
    #include [blank_start]<string>[blank_end]
    string greeting = "Hello";

    1. A<string>
42. 42string firstName = "John ";
    string lastName = "Doe";
    string fullName = firstName [blank_start]+[blank_end] lastName;
    cout << fullName;
    Output:
    John Doe

    1. A+
43. 43 string firstName = "John";
    string lastName = "Doe";
    string fullName = firstName + [blank_start]" "[blank_end] + lastName;
    cout << fullName;

    1. A" "
44. 44string firstName = "John ";
    string lastName = "Doe";
    string fullName = firstName[blank_start].append[blank_end](lastName);
    cout << fullName;

    1. A.append
45. 45string x = "10";
    string y = "20";
    string z = x + y;
    Ouput:
    [blank_start]1020[blank_end]

    1. A1020
46. 46string x = "10";
    int y = 20;
    string z = x + y;
    Output:
    [blank_start]error[blank_end]

    1. Aerror
47. 47string txt = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    cout << "The length of the txt string is: " << [blank_start]txt.length()[blank_end];
    Output:
    Print length of string

    1. Atxt.length()
48. 48string txt = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    cout << "The length of the txt string is: " << [blank_start]txt.size()[blank_end];
    Print length other than length()

    1. Atxt.size()
49. 49string myString = "Hello";
    cout << [blank_start]myString[2][blank_end];
    // Output l

    1. AmyString[2]
50. 50string myString = "Hello";
    [blank_start]myString[blank_end][0] = 'J';
    cout << myString;

    1. AmyString
51. 51string firstName;
    cout << "Type your first name: ";
    [blank_start]cin>>firstName[blank_end];
    cout << "Your name is: " << firstName;
    Take Input of the string

    1. Acin>>firstName
52. 52string fullName;
    cout << "Type your full name: ";
    [blank_start]getline[blank_end](cin, fullName);
    cout << "Your name is: " << fullName;

    1. Agetline
53. 53#include <iostream>
    #include <string>
    
    int main() {
    std::string greeting = "Hello";
    [blank_start]std::[blank_end]cout << greeting;
    return 0;
    }
    Other than using namespace std;

    1. Astd::
54. 54cout<<[blank_start]max(5,10)[blank_end];
    Give maximum of 5 and 10

    1. Amax(5,10)
55. 55cout<<[blank_start]min(5,10)[blank_end];
    Give minimum of 5 and 10

    1. Amin(5,10)
56. 56cout << [blank_start]sqrt([blank_end]64);
    find sqrt

    1. Asqrt(
57. 57cout << [blank_start]round[blank_end](2.6);
    round it ofrf

    1. Around
58. 58int x = 20;
    int y = 18;
    [blank_start]if[blank_end] (x > y) {
    cout << "x is greater than y";
    }

    1. Aif
59. 59int time = 20;
    if (time < 18) {
    cout << "Good day.";
    } [blank_start]else[blank_end] {
    cout << "Good evening.";
    }
    // Outputs "Good evening."

    1. Aelse
60. 60int time = 22;
    if (time < 10) {
    cout << "Good morning.";
    } [blank_start]else if[blank_end] (time < 20) {
    cout << "Good day.";
    } else {
    cout << "Good evening.";
    }
    // Outputs "Good evening."

    1. Aelse if
61. 61int day = 4;
    [blank_start]switch[blank_end] (day) {
    case 1:
    cout << "Monday";
    break;
    case 2:
    cout << "Tuesday";
    break;
    case 3:
    cout << "Wednesday";
    break;
    case 4:
    cout << "Thursday";
    break;
    case 5:
    cout << "Friday";
    break;
    case 6:
    cout << "Saturday";
    break;
    case 7:
    cout << "Sunday";
    break;
    }

    1. Aswitch
62. 62int day = 4;
    switch (day) {
    case 6:
    cout << "Today is Saturday";
    break;
    case 7:
    cout << "Today is Sunday";
    break;
    [blank_start]default:[blank_end]
    cout << "Looking forward to the Weekend";
    }
    // Outputs "Looking forward to the Weekend"

    1. Adefault:
63. 63int i = 0;
    [blank_start]while[blank_end] (i < 5) {
    cout << i << "\n";
    i++;
    }

    1. Awhile
64. 64int i = 0;
    [blank_start]do[blank_end] {
    cout << i << "\n";
    i++;
    }
    while (i < 5);

    1. Ado
65. 65[blank_start]for[blank_end] (int i = 0; i <= 10; i = i + 2) {
    cout << i << "\n";
    }

    1. Afor
66. 66for (int i = 0; i < 10; i++) {
    if (i == 4) {
    [blank_start]break[blank_end];
    }
    cout << i << "\n";
    }
    Stop the loop when i = 4

    1. Abreak
67. 67for (int i = 0; i < 10; i++) {
    if (i == 4) {
    [blank_start]continue[blank_end];
    }
    cout << i << "\n";
    }
    Skip printing 4

    1. Acontinue
68. 68string cars[blank_start][4][blank_end];
    create array with 4 strings to store

    1. A[4]
69. 69string cars[blank_start][4][blank_end] = {"Volvo", "BMW", "Ford", "Mazda"};

    1. A[4]
70. 70[blank_start]int[blank_end] myNum[3] = {10, 20, 30};

    1. Aint
71. 71string cars[4] = {"Volvo", "BMW", "Ford", "Mazda"};
    cout << [blank_start]cars[2][blank_end];
    call 3rd element

    1. Acars[2]
72. 72string cars[4] = {"Volvo", "BMW", "Ford", "Mazda"};
    cars[[blank_start]2[blank_end]] = "Opel";
    cout << cars[2];
    change the 3rd list itrm

    1. A2
73. 73string cars[4] = {"Volvo", "BMW", "Ford", "Mazda"};
    for(int i = 0; i < 4; i++) {
    cout << i << ": " << cars[blank_start][i][blank_end] << "\n";
    }

    1. A[i]
74. 74string cars[] = {"Volvo", "BMW", "Ford"}; // size of array is always [blank_start]3[blank_end]

    1. A3
75. 75string cars[5] = {"Volvo", "BMW", "Ford"}; // size of array is [blank_start]5[blank_end], even though it's only three elements inside it

    1. A5
76. 76string cars[5] = {"Volvo", "BMW", "Ford"}; // size of array is 5, even though it's only three elements inside it
    [blank_start]cars[[blank_end]3] = "Mazda";
    cars[4] = "Tesla";

    1. Acars[
77. 77It is also possible to declare an array without specifying the elements on declaration, and add them later:
    [blank_start]string[blank_end] cars[5];
    cars[0] = "Volvo";
    cars[1] = "BMW";

    1. Astring
78. 78string food = "Pizza"; // food variable
    string [blank_start]&[blank_end]meal = food; // reference to food

    1. A&
79. 79string food = "Pizza";
    
    cout << [blank_start]&[blank_end]food; // Outputs 0x6dfed4

    1. A&
80. 80string food = "Pizza"; // A food variable of type string
    cout << food; // Outputs the value of food (Pizza)
    cout << [blank_start]&[blank_end]food; // Outputs the memory address of food (0x6dfed4)

    1. A&
81. 81string food = "Pizza"; // A food variable of type string
    [blank_start]string*[blank_end] ptr = &food; // A pointer variable, with the name ptr, that stores the address of food
    cout << &food << "\n";
    cout << ptr << "\n";

    1. Astring*
82. 82// Create a function
    [blank_start]void myFunction()[blank_end] {
    cout << "I just got executed!";
    }
    
    int main() {
    myFunction(); // call the function
    return 0;
    }
    
    // Outputs "I just got executed!"

    1. Avoid myFunction()
83. 83void myFunction([blank_start]string fname[blank_end]) {
    cout << fname << " Refsnes\n";
    }
    
    int main() {
    myFunction("Liam");
    myFunction("Jenny");
    myFunction("Anja");
    return 0;
    }
    
    // Liam Refsnes
    // Jenny Refsnes
    // Anja Refsnes

    1. Astring fname
84. 84void myFunction(string country [blank_start]=[blank_end] "Norway") {
    cout << country << "\n";
    }
    
    int main() {
    myFunction("Sweden");
    myFunction("India");
    myFunction();
    myFunction("USA");
    return 0;
    }
    
    // Sweden
    // India
    // Norway
    // USA
    

    1. A=
85. 85void myFunction([blank_start]string fname,int age[blank_end]) {
    cout << fname << " Refsnes. " << age << " years old. \n";
    }
    
    int main() {
    myFunction("Liam", 3);
    myFunction("Jenny", 14);
    myFunction("Anja", 30);
    return 0;
    }
    
    // Liam Refsnes. 3 years old.
    // Jenny Refsnes. 14 years old.
    // Anja Refsnes. 30 years old.

    1. Astring fname,int age
86. 86int myFunction(int x) {
    [blank_start]return[blank_end] 5 + x;
    }
    
    int main() {
    cout << myFunction(3);
    return 0;
    }
    
    // Outputs 8 (5 + 3)

    1. Areturn
87. 87int myFunction([blank_start]int x,int y[blank_end]) {
    return x + y;
    }
    
    int main() {
    cout << myFunction(5, 3);
    return 0;
    }
    
    // Outputs 8 (5 + 3)

    1. Aint x,int y
88. 88int myFunction(int x, int y) {
    return x + y;
    }
    
    int main() {
    [blank_start]int[blank_end] z = myFunction(5, 3);
    cout << z;
    return 0;
    }
    // Outputs 8 (5 + 3)

    1. Aint
89. 89int plusFunc(int x, int y) {
    return x + y;
    }
    
    double plusFunc(double x, double y) {
    return x + y;
    }
    
    int [blank_start]main()[blank_end] {
    int myNum1 = plusFunc(8, 5);
    double myNum2 = plusFunc(4.3, 6.26);
    cout << "Int: " << myNum1 << "\n";
    cout << "Double: " << myNum2;
    return 0;
    }

    1. Amain()

Description

Computer Science Quiz on C++, created by revanth naidu on 01/04/2021.

Author

revanth naidu

Language

English

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Tags

computer science

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