Question

IN C++ ADD COMMENTS AS MUCH AS POSSIBLE Exercise 1: Duplicate the Arrays Suppose you are developing a program that works with arrays of integers, and you find that you frequently need to duplicate the arrays. Rather than rewriting the array-duplicating code each time you need it, you decide to write a function that accepts an array and its size as arguments. Creates a new array that is a copy of the argument array, and returns a pointer to the new array. Creates a new array that is a copy of the argument array, and returns a pointer to the new array. The function will work as follows: Accept an array and its size as arguments. Dynamically allocate a new array that is the same size as the argument array. Copy the elements of the argument array to the new array. Return a pointer to the new array. Exercise 2: Returning Pointers from Functions Suppose you want to write a function that passes an array argument, getRandomNumbers, to get a pointer to an array of random numbers in the array. The function dynamically allocates an array, uses the system clock to seed the random number generator, populates the array with random values, and then returns a pointer to the array. Function getRandomNumbers to generate a random array and return a pointer. int* getRandomNumbers(int num); // The parameter indicates the number of numbers requested. The algorithm can be described as follows: Accept an array size as argument Dynamically allocate a new array that is the same size as the argument. White a loop to generate random numbers to the new array Return result as a pointer Exercise 3: Increase Array Size Once an array is created, its size is fixed. Sometimes, you need to add more values to an array than it is able to hold; in this case, you may create a new larger array to replace the existing array. Write a function that returns a pointer to a new int array that is double the size of the array passed in the parameters to this function. Use the following header: int *double_capacity(const int *list, int size) Write a test program that prompts the user to enter the number of elements of an array, and then enter the elements (type int). After that the program will use your double_capacity() function to double the capacity of the array and prompt the user for more values. Finally, the program will display all the elements of the array. Note: make sure to delete the old array, since it isn't likely to be used after the function creates and returns the new, bigger array. Exercise 4: Student Scores In these assignments you are asked to develop functions that have dynamic arrays as parameters. Remember that dynamic arrays are accessed by a pointer variable and thus the parameters that serve as dynamic arrays are, in fact, pointer variables. void sort(float* score, int num_scores); // a prototype whose function has a // dynamic array as its first //parameter. It is a pointer variable int main() { float *score; // a pointer variable score = new float(num_scores); // allocation of the array sort(score,scoreSize); // call to the function Write a program that will read scores into an array. The size of the array should be input by the user (dynamic array). The program will find and print out the average of the scores. It will also call a function that will sort (using a bubble sort) the scores in ascending order. The values are then printed in this sorted order. Sample Run: Please input the number of scores 5 Please enter a score 100 Please enter a score 90 Please enter a score 95 Please enter a score 100 Please enter a score 90 The average of the scores is 95 Here are the scores in ascending order 90 90 95 100 100

Answer 1

#include<iostream>

using namespace std;

void bubble (int arr[ ], int n)

{
int i,j,temp;
for(i=0; i<(n-1); i++)

{

for(j=0; j<(n-i-1); j++)

{

if(arr[j]>arr[j+1])

{

temp=arr[j];

arr[j]=arr[j+1];

arr[j+1]=temp;

cin>>n;

cout<<"Enter "<<n<<" scores :";

}

}

}

cout<<"here are the scores in ascending order :\n";

for(i=0; i<n; i++)

{

cout<<arr[i]<<endl;

}

}

int main()

{

int n,i,arr[50], j,temp,sum;

float avg=0.0;

cout<<"Enter total number of scores :";

for(i=0; i<n; i++)

{

cin>>arr[i];

}

for(i=0; i<n; i++)

{

sum+=arr[i];

}

avg= sum/n;

cout<< " the average of the scores is :" <<avg<<endl;

bubble(arr,n);

return 0;

}

In the above program

We first declare the header files which iostream

Using namespace std enables the user to use different names for objects and classes in c++(not used in this program)

We then write a function for bubble sort by passing the size and array values to it from the main function

Here the technique used is bubble sort where each pair of adjacent elements in the array are checked and swapped if not I'm order

In the main function we declare all variables

We dynamically take the size of the array and array values from the user and calculate both the sum and average of these valu(i.e the scores) we then print the average value of the scores.

By calling the bubble function we sort the array of scores by passing it as a parameter to the bubble sort function and print the ascending order of the scores