Question

a. Write a constructor which initializes the canvas_frame, canvas, and title. The constructor receives a string parameter to initialize the title, a Rectangle object to pass to the Rectangle constructor when creating the canvas_frame object, and a Rectangle object to pass to the Rectangle constructor when creating the canvas object. b. Write a print method that prints the title and prints the perimeter of canvas_frame and the area of canvas - call the methods area and perimeter to get both values. c. From the Rectangle class defined in above, derive a class named Box having an additional data member named depth, a constructor with three parameters (one for the depth and two for the constructor of Rectangle), and a volume method that returns the volume of the box volume is length * width * depth. 8. Consider the following declaration (in main) : int num[13] [7]; Assume that array num is filled completely. Write functions to perform each of the following: a. A function that prints all elements in the array that are greater than 80 or less than 10. b. A function that finds the largest number in the array and returns its subscript. c. A function that finds and returns the average of all the numbers in the array. d. A function that print the entire array in a neat table, but starting with the last row and proceeding in reverse order to the first.

Answer 1

We are allowed to do only 4 questions if more question is asked in a single question and even language is not defined to create the objects. So doing question no. 8 in c++, as language will not matter much in it.

 #include<bits/stdc++.h> using namespace std; // print all the elements greater than 80 or less than 10 from the array void lgt(int num[13][7]){ for(int i = 0; i < 13; i++){ for(int j = 0; j < 7; j++){ if(num[i][j] > 80 || num[i][j] < 10){ cout << num[i][j] << endl; } } } } // this function returns the largest element in the array int largest(int num[13][7]){ int max = INT_MIN; for(int i = 0; i < 13; i++){ for(int j = 0; j < 7; j++){ if(num[i][j] > max){ max = num[i][j]; } } } return max; } //this function returns the average of all elements in the array float average(int num[13][7]){ int total = 0; for(int i = 0; i < 13; i++){ for(int j = 0; j < 7; j++){ total += num[i][j]; } } return float(total)/(13*7); } // this function prints the array in table form from last row to first row void print(int num[13][7]){ for(int i = 12; i >=0; i--){ for(int j = 0; j < 7; j++){ cout << num[i][j] << " "; } cout << endl; } } int main() { int num[13][7]; // declare the array // fill array with the random number for(int i = 0; i < 13; i++){ for(int j = 0; j < 7; j++){ num[i][j] = rand() %100; } } lgt(num); int max = largest(num); cout << "Largest no. " << max << endl; float avg = average(num); cout << "average: " << avg << endl; print(num); return 0; } 

OUTPUT:

83
86
93
86
92
90
82
2
93
84
98
91
96
81
5
84
5
95
82
87
8
88
84
3
99

Largest no. 99

average: 51.4725

88 84 3 51 54 99 32
64 43 50 87 8 76 78
24 95 82 45 14 67 34
27 36 5 46 29 13 57
62 70 96 81 5 25 84
70 13 26 91 80 56 73
21 19 84 37 98 24 15
67 93 56 11 42 29 73
67 35 29 2 22 58 69
68 67 29 82 30 62 23
63 26 40 26 72 36 11
92 49 21 62 27 90 59
83 86 77 15 93 35 86