Question

Write a C++ program that dynamically allocates an array large enough to hold a user-defined number of test scores. Once all the scores are entered, the array should be passed to a function that sorts them in ascending order. Another function should be called that calculates the average score. The program should display the sorted list of scores and averages with appropriate headings. Use pointer notation rather than array notation whenever possible.

Input Validation: Do not accept negative numbers for test scores.

Answer 1

#include <iostream>

using namespace std;

//function to sort an array
void sortArray(float a[], int size)
{
//outer for loop
for(int i=0;i<size;i++)
{
//inner for loop
for (int j=0;j<size;j++)
{
if(a[i]<a[j])
{
//swap the values
int temp = *(a+i);
*(a+i)=*(a+j);
*(a+j) = temp;
}
}
}
}

//function to calculate the average score
float averageScore(float a[], int size)
{
float avg = 0;
for(int i=0;i<size;i++)
{
avg = avg + *(a+i);
}
avg = avg / size;
  
return avg;
}

int main()
{
//variable declaration
int size;
float sc, avg;
  
//get user input
cout<<"Enter the number of test score: ";
cin>>size;
  
float *score = new float[size];
  
//get user input
cout<<"Enter the test score: ";
for(int i=0; i<size; i++)
{
cin>>sc;
if(sc<0)
{
cout<<"Test score must be a positive number!";
i--;
}
else
{
*(score+i) = sc;
}
}
  
//function calling
sortArray(score, size);
avg = averageScore(score, size);
  
//display the sorted array
cout<<endl<<"The sorted array is: ";
for(int i=0; i<size; i++)
{
cout<<*(score+i)<<" ";
}
  
//display the result
cout<<endl<<endl<<"The average score is: "<<avg<<endl;
  
delete [] score;
  
return 0;
}

OUTPUT: