Write a program that reads in a series of positive integers terminted by a -1, e

Question

Write a program that reads in a series of positive integers terminted by a -1, e.g.

          73 95 61 21 90 85 14 78 -1

The values should be stored in an array.   The program then prints the values in reverse order as well as the average (to one decimal place). For example,

Please enter the integers: 73 95 61 21 90 85 14 78 -1

The values in reverse order are

       78   14   85   90   21   61   95   73

The average is 64.6

You must use a function for computing the reverse, passing the array as an argument. Thus the function header will be similar to

void reverse(int[] A);

Explanation / Answer

#include <iostream>

using namespace std;
void reverse(int A[]);
double calAverage(int A[]);
int size=0;
int main()
{
    int a[100],flag=1;
   cout << "Enter integers. Enter -1 to end the list" << endl;
   while(flag==1)
   {
       cin>>a[size];
       if(a[size]==-1)
       flag=0;
       else
       size++;
   }
   cout << "Reverse of array";
   reverse(a);
   cout <<endl <<" Average :" << calAverage(a) <<endl;
   return 0;
}
void reverse(int A[])
{
    for(int i=size;i>=0;i--)
    cout<<A[i]<<" ";
}
double calAverage(int A[])
{
    double total=0;
    for(int i=size;i>=0;i--)
    total+=A[i];
    return total/(size);
}

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