Question

c++ please no global varaible

write a value returning function input data to dynamically allocate a short array of size elements and store the input data entered from the disk file into array.Return the base address of the array allocated.Read the data from the text file Hello.txt and store the data in reverse order in the array.the size of the data set will be in the file size 10 and the data was 1 2 3 4 5 6 7 8 9 10. The data in the array beginning with element 0 would be 10 9 8 7 6 5 4 3 2 `1.

All functions must use pointer to access array and pointer must be used terminate loops.You must increment a pointer to access successive elements of array. No INTEGER CONTROLLED LOOPS AND SUBSCRIPTS SUCH AS array[n] or *(array+n) and no integer counter.

#include<fstream>

#include<iostream>

#include<stdlib.h>

#include<new>

using namespace std;

void display_data(short *data, short size);         // function to display data in an array

short * input_data(short size, ifstream &filein);   // allocate memory and read the data from the file and store it in the array in reverse order

short compare_arrays(short *list1, short size1, short *list2, short size2); // compare two arrays

short palindrome(short *data, short size);                  // examine the contents of the array to determine if the data is a palindrome

void GreaterThanAvg(short *data, short &size, short &avg); // find all values in the array which are greater than the integer average of all the data in the array

int main()

{   

    short *list1, size1,   // pointer to list1 array and size1    

              *list2, size2,   // pointer to list1 array and size1  

               average,         // average value in the array         

                results;           // used to store the result returned from a function

    short setNO=1;          // variable to keep track of the number of data sets entered

        

    //cout<<"Program will store data in the array\n";

    //cout<<"Program will compare two arrays to determine if they are identical, in reverse order of each other or not the same\n";

    //cout<<"Program will also determine if the data in an array is a palindrome\n";  

   

    ifstream filein("FinalExam.txt"); // enter the size of the array from the disk firl

  

    while(filein>>size1) // loop to permit user to test many data sets

    {      

        cout<<"----------------------DataSet "<<setNO++<<"-----------------------\n";

        list1 = input_data(size1, filein);                 

        cout<<"\nthere are "<<size1<<" values in the list1 array\n";      

        display_data(list1, size1);   

        filein>>size2;   // enter the size of the second array

        list2 = input_data(size2, filein);         

        cout<<"there are "<<size2<<" values in the list2 array\n";       

        display_data(list2, size2);  

        palindrome(list1, size1)? cout<<"list1 was a palindrome\n" : cout<<"list1 was not a palindrome\n"; // this is ternary test to for palindrome

        palindrome(list2, size2)? cout<<"list2 was a palindrome\n" : cout<<"list2 was not a palindrome\n";

        results = compare_arrays(list1, size1, list2, size2); // compare two arrays

        if(results == 1)

             cout<<"List1 and List2 were identical arrays\n";

        else if(results == 2)            

             cout<<"List1 and List2 were in reverse order of each other\n";

        else if(results == 3)            

             cout<<"List1 and List2 are different arrays\n";

        else

             cout<<"an incorrect value was returned from the function - probably a logic error\n";   

        GreaterThanAvg(list1, size1, average); // function to find all numbers in the array greater than the average

             cout<<"There were "<<size1<<" values in list1 that were greater than the average value of "<<average<<endl;

        if(size1) display_data(list1, size1);

        GreaterThanAvg(list2, size2, average);

        cout<<"There were "<<size2<<" values in list1 that were greater than the average value of "<<average<<endl;

        if(size2) display_data(list2, size2);                            

        cout<<endl;           

        delete [] list1; // delete the memory allocated

        delete [] list2;                                        

    }   

    // pause the program to see the results

     //system("pause");

     return 0;      

}

void display_data(short *data, short size)

{

    short i;

    for(i = 0; i < size; i++)

    { // display the numbers in the array separated by 1 blank all on the same line          

      cout<<data[i]<<' ';

    }

    cout<<endl;    

}

Answer 1

#include<fstream>
#include<iostream>
#include<stdlib.h>

using namespace std;

void display_data(short *data, short size);         // function to display data in an array

short * input_data(short size, ifstream &filein);   // allocate memory and read the data from the file and store it in the array in reverse order

short compare_arrays(short *list1, short size1, short *list2, short size2); // compare two arrays

short palindrome(short *data, short size);                  // examine the contents of the array to determine if the data is a palindrome

void GreaterThanAvg(short *data, short &size, short &avg); // find all values in the array which are greater than the integer average of all the data in the array

int main()

{   

        short *list1, size1,   // pointer to list1 array and size1    

        *list2, size2,   // pointer to list1 array and size1  

        average,         // average value in the array         

        results;           // used to store the result returned from a function

        short setNO=1;          // variable to keep track of the number of data sets entered



    //cout<<"Program will store data in the array\n";

    //cout<<"Program will compare two arrays to determine if they are identical, in reverse order of each other or not the same\n";

    //cout<<"Program will also determine if the data in an array is a palindrome\n";  



    ifstream filein("FinalExam.txt"); // enter the size of the array from the disk firl



    while(filein>>size1) // loop to permit user to test many data sets

    {      

        cout<<"----------------------DataSet "<<setNO++<<"-----------------------\n";

        list1 = input_data(size1, filein);                 

        cout<<"\nthere are "<<size1<<" values in the list1 array\n";      

        display_data(list1, size1);   

        filein>>size2;   // enter the size of the second array

        list2 = input_data(size2, filein);         

        cout<<"there are "<<size2<<" values in the list2 array\n";       

        display_data(list2, size2);  

        palindrome(list1, size1)? cout<<"list1 was a palindrome\n" : cout<<"list1 was not a palindrome\n"; // this is ternary test to for palindrome

        palindrome(list2, size2)? cout<<"list2 was a palindrome\n" : cout<<"list2 was not a palindrome\n";

        results = compare_arrays(list1, size1, list2, size2); // compare two arrays

        if(results == 1)

             cout<<"List1 and List2 were identical arrays\n";

        else if(results == 2)            

             cout<<"List1 and List2 were in reverse order of each other\n";

        else if(results == 3)            

             cout<<"List1 and List2 are different arrays\n";

        else

             cout<<"an incorrect value was returned from the function - probably a logic error\n";   

        GreaterThanAvg(list1, size1, average); // function to find all numbers in the array greater than the average

             cout<<"There were "<<size1<<" values in list1 that were greater than the average value of "<<average<<endl;

        if(size1) display_data(list1, size1);

        GreaterThanAvg(list2, size2, average);

        cout<<"There were "<<size2<<" values in list1 that were greater than the average value of "<<average<<endl;

        if(size2) display_data(list2, size2);                            

        cout<<endl;           

        delete [] list1; // delete the memory allocated

        delete [] list2;                                        

    }   

    // pause the program to see the results

     //system("pause");

     return 0;      

}

void display_data(short *data, short size)

{

    short i;

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

    { // display the numbers in the array separated by 1 blank all on the same line          

      cout<<data[i]<<' ';

    }

    cout<<endl;    

}


   // allocate memory and read the data from the file and store it in the array in reverse order
short * input_data(short size, ifstream &filein) {
        filein >> size;

        short *data = new short[size];
        short *end = data + size + 1;

        do {
                end -= 1;
                filein >> *end;
        } while(end != data);

        return data;
}

short compare_arrays(short *list1, short size1, short *list2, short size2) {
        if(size1 != size2) {
                return 3;
        }
        short *end1 = list1 + size1;
        short *end2 = list2 + size2;

        short *p1 = list1;
        short *p2 = list2;

        bool same = true;
        while((p1 != end1) && (p2 != end2)) {
                if(*p1 != *p2) {
                        same = false;
                        break;
                }
                p1 += 1;
                p2 += 1;
        }

        if(same) {
                return 1;
        }

        same = true;
        p2 = end2 - 1;
        while((p1 != end1) && (p2 != list2-1)) {
                if(*p1 != *p2) {
                        same = false;
                        break;
                }
                p1 += 1;
                p2 -= 1;
        }

        if(same) {
                return 2;
        }

        return 3;
}

short palindrome(short *data, short size) {
        short *end = data + size;
        short *originalStart = data;

        do {
                end = end-1;

                if(*data != *end) {
                        return 0;
                }
                data += 1;
        }while(end != originalStart);
        return 1;
}

// find all values in the array which are greater than the integer average of all the data in the array
void GreaterThanAvg(short *data, short &size, short &avg) {
        short *end = data + size;
        short *originalStart = data;

        short sum = 0;
        short count = size;

        do {
                end = end-1;
                sum += *end;
        }while(end != originalStart);
        avg = sum/count;

        end = data + size;
        size = 0;
        do {
                end = end-1;
                if(*end > avg) {
                     size++;   
                }
        }while(end != originalStart);
}

I have filled in the code as much as i can, but i dont have your input file.. so could not do a test run.. Please check and let me know if any issues, Thanks!