Question

March 18, 2021

 

Note:  It is important that you do this lab exercise properly.  Please read and follow the instructions very carefully.  You need to understand what you are required to do, and complete the program.  It uses a one-dimensional array.  You can refer to the PowerPoint slides, many of the tasks can be found there, but you need to apply them for this program.

 

Note that the array will be filled with the integers when the user enters them.

 

Consider proper layout and correct indentation.

 

 

1.       Consider the following program that reads a number of nonnegative integers into an array and prints the contents of the array.   You will add to the program.  Complete the missing parts, add new function prototypes and function definitions, and test the program several times.  Do not do all at once.

 

Add the following to the program:

 

a)       Write a function to display some heading with useful information which will display on the screen for the user

 

b)       Write a void function that prints the list of nonnegative integers in reverse.

 

c)       Write a void function that prints all the numbers stored in the list that are greater than 10.  It will also print the number of such numbers found.

 

d)       Write a function that determines the largest value stored in the array and returns that value to the calling function main. 

 

e)       Write a function that determines the number of even integers stored in the array and returns that value to the calling function main. 

 

f)        Write a function that calculates the average of the values stored in the array and returns that value. to the calling function main. 

 

g)       Write the function calls with the appropriate arguments in the function main.  Any values returned will be output.

 

h)       Write appropriate block comments for each function header similar to the ones provided.  Show your understanding of the program and thus provide useful information to the reader.

 

i)        Test all the functions using appropriate test data.  Write the documentation and include the screenshots.  Add the source code by copy and paste to the document.

 

 

j)        Submit the files to Moodles:   .cpp file, .exe file, and the Word document.

 

 

 

Answer 1

#include<iostream> // for cin, cout

using namespace std;

const int MAX_SIZE = 20;

void ReadList(int[], int&);

void PrintList(const int[], int);

void display_heading();

void print_reverse(int[], int);

void greater_than_ten(int[], int);

int largest(int[], int);

int smallest(int[], int);

double average(int[], int);

int main(){

    

    int list[MAX_SIZE];

    int numberOfIntegers;

    ReadList(list, numberOfIntegers);

    PrintList(list, numberOfIntegers);

    

    display_heading();

    print_reverse(list, numberOfIntegers);

    greater_than_ten(list, numberOfIntegers);

    cout<<largest(list, numberOfIntegers)<<endl;

    cout<<smallest(list, numberOfIntegers)<<endl;

    cout<<average(list, numberOfIntegers)<<endl;

    

    

    system("pause");

    

    return 0;

}

//******************************************************************************

//The function definition of ReadList.

// The function reads non negative numbers from keyboard into array.

// The parameter list is an array to hold non negative numbers

// The parameter length holds length of the array.

//******************************************************************************

void ReadList(int list[], int& length){

    int number;

    int index = 0;

    

    cout<<"Enter nonnegative integers separated by a blank space,\n"

    <<" and mark the end of the list with a negative number: ";

    cin>> number;

    

    while(number >= 0 && index < MAX_SIZE){

        list[index] = number;

        index++;

        cin>>number;

    }

    length = index;

}

//******************************************************************************

//The function definition of PrintList.

// The function prints the non negative integers in array.

// and number of integers in array.

// The parameter list is an array to hold non negative numbers

// The parameter length holds length of the array.

//******************************************************************************

void PrintList(const int list[], int length){

    int index = 0;

    cout<<"The list contains "<<length

    <<" nonnegative integers as follows :\n";

    

    while(index < length){

        cout<<list[index]<<" ";

        index++;

    }

    cout<<"\n";

}

//******************************************************************************

//The function definition of display_heading.

// The function prints important information for user.

//******************************************************************************

void display_heading(){

    cout<<"Welcome! This code demonstrates list operations"<<endl;

}

//******************************************************************************

//The function definition of print_reverse.

// The function prints elements of array in reverse order.

// The parameter list is an array to hold non negative numbers

// The parameter length holds length of the array.

//******************************************************************************

void print_reverse(int list[], int length){

    

    for(int index = length - 1; index >= 0; index--){

        cout<<list[index]<<" ";

    }

    cout<<"\n";

}

//******************************************************************************

//The function definition of greater_than_ten.

// The function prints all elements greater than 10 and

// the number of integers greater than 10.

// The parameter list is an array to hold non negative numbers

// The parameter length holds length of the array.

//******************************************************************************

void greater_than_ten(int list[], int length){

    int count = 0;

    

    for(int index = 0; index < length; index++){

        if(list[index] > 10){

            cout<<list[index]<<" ";

            count++;

        }

    }

    cout<<"\n";

    cout<<"Count of numbers greater than 10 is "<< count<<endl;

}

//******************************************************************************

//The function definition of largest.

// The function returns largest number in the list.

// The parameter list is an array to hold non negative numbers

// The parameter length holds length of the array.

//******************************************************************************

int largest(int list[], int length){

    int ans = -1;

    for(int index=0; index<length;index++){

        if(list[index] > ans){

            ans = list[index];

        }

    }

    return ans;

}

//******************************************************************************

//The function definition of smallest.

// The function returns smallest number in the list.

// The parameter list is an array to hold non negative numbers

// The parameter length holds length of the array.

//******************************************************************************

int smallest(int list[], int length){

    int ans = list[0];

    for(int index = 1; index<length; index++){

        if(list[index] < ans){

            ans = list[index];

        }

    }

    return ans;

}

//******************************************************************************

//The function definition of average.

// The function returns average of the numbers in the list.

// The parameter list is an array to hold non negative numbers

// The parameter length holds length of the array.

//******************************************************************************

double average(int list[], int length){

    double total = 0;

    for(int index=0;index<length;index++){

        total+=list[index];

    }

    

    double av = total/length;

    return av;

}