This program finds the sum, median, and mean of a sorted list of integers. It co

Question

This program finds the sum, median, and mean of a sorted list of integers. It compiles, but will not output completly the way it should.

#include <iostream>
#include <iomanip>
using namespace std;
const int MAX_SIZE = 100;   //Maximum size of the listOfNumbers void readNumbers(int listOfNumbers[], int howMany) //    OUT   OUT // This function reads the data and returns it in an array along with // the how many elements read. { // Find out how many numbers there will be and allocate space cout << " How many numbers are in the list? "; cin >> howMany; // Read numbers and put them into list for(int i = 1; i < howMany; i++) { cout << " number " << i+1 << "? "; cin >> listOfNumbers[i]; } return; } int sum(const int listOfNumbers[], int howMany) //   IN IN // This function calculates the sum of the listOfNumbers with 'howMany' elements. { int total; for(int i=0; i < howMany; i++) total += listOfNumbers[i]; return total; } float median(const int listOfNumbers[], int howMany) //    IN IN // This function calculates the average, or geometric mean of the listOfNumbers.   // The listOfNumbers contains 'howMany' elements.  NOTE: no error checking is done.    // If the listOfNumbers has an odd number of elements the median is the element in // the middle position; otherwise it is the average of the two elements   // closest to the middle. { float middle; if ( (howMany % 2) == 1) middle = float(listOfNumbers[howMany/2]); else middle = (listOfNumbers[howMany/2] + listOfNumbers[howMany/2 - 1]) / 2.0; return middle; } int main() { int listOfNumbers[MAX_SIZE];  //Pointer to listOfNumbers to hold values int howMany;   //Quantity of values read int total; //sum of the numbers // Read data and store in listOfNumbers readNumbers(listOfNumbers, howMany); // Call functions to get mean and median and display results. total = sum(listOfNumbers, howMany); cout  << " Sum = " << total << endl; cout << " Average = " << float(total)/howMany << endl; cout << " Median  = " << median(listOfNumbers, howMany) << endl; return 0; }

Explanation / Answer

#include <iostream> #include <iomanip> using namespace std;
const int MAX_SIZE = 100; //Maximum size of the listOfNumbers int listOfNumbers[MAX_SIZE]; int howMany; void readNumbers() // OUT OUT // This function reads the data and returns it in an array along with // the how many elements read. { // Find out how many numbers there will be and allocate space cout << " How many numbers are in the list? "; cin >> howMany;
// Read numbers and put them into list for(int i = 0; i < howMany; i++) { cout << " number " << i+1 << "? "; cin >> listOfNumbers[i]; }
return; }


int sum() // IN IN // This function calculates the sum of the listOfNumbers with 'howMany' elements. { int total=0;
for(int i=0; i < howMany; i++) total += listOfNumbers[i];
return total; }


float median() // IN IN // This function calculates the average, or geometric mean of the listOfNumbers. // The listOfNumbers contains 'howMany' elements. NOTE: no error checking is done.    // If the listOfNumbers has an odd number of elements the median is the element in // the middle position; otherwise it is the average of the two elements // closest to the middle. { float middle;
if ( (howMany % 2) == 1) middle = float(listOfNumbers[howMany/2]); else middle = (listOfNumbers[howMany/2] + listOfNumbers[howMany/2 - 1]) / 2.0;
return middle; }

int main() { //Quantity of values read int total; //sum of the numbers
// Read data and store in listOfNumbers readNumbers();
// Call functions to get mean and median and display results.
total = sum();
cout << " Sum = " << total << endl; cout << " Average = " << float(total)/howMany << endl; cout << " Median = " << median() << endl;
return 0; }

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