Question

Write a program that dynamically allocates an array in the freestore large enough to hold a user defined number of test scores as doubles. Once all the scores are entered, the array should be passed to a function that finds the highest score. Another function the array should be passed to a function that finds the lowest score. Another function should be called that calculates the average score. The program should show the highest, lowest and average scores. Must use pointer notation in the functions to pass the array. Add some user input protection to prevent negative numbers.

Required Prototypes:

// Function prototypes

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

// Function average                          *

// This function calculates and returns the *

// average of the values stored in the array *

// passed into the scores parameter. The     *

// parameter numScores holds the number of   *

// elements in the array.                    *

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

double average(double* score, int numScores);

double highest(double* score, int numScores);

double lowest(double* score, int numScores);

Answer 1

#include <iostream>

using namespace std;
double average(double* score, int numScores){
double sum=0;
for(int i=0;i<numScores;i++)
sum+=score[i];
return sum/numScores;
}

double highest(double* score, int numScores){
double max=score[0];
for(int i=1;i<numScores;i++)
if(max<score[i])
max=score[i];
return max;
}

double lowest(double* score, int numScores){
double min=score[0];
for(int i=1;i<numScores;i++)
if(min>score[i])
min=score[i];
return min;
}

int main()
{
int n;
double temp;
cout<<"Enter number of scores ";
cin>>n;
double *arr= (double *)malloc(n*sizeof(double));
cout<<"Enter "<<n<<" scores: ";
for(int i=0;i<n;){
cin>>temp;
if(temp<0)
cout<<"Invalid score \n";
else{
arr[i]=temp;
i++;
}
  
}
cout<<"Average : "<<average(arr,n)<<endl;
cout<<"Highest score : "<<highest(arr,n)<<endl;
cout<<"Lowest score : "<<lowest(arr,n)<<endl;
  
  
return 0;
}