Question

Reverse.cpp

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);

NOTE: The program standards are given below:

1. Program Header .   In addition to you name and project number, include a brief description of the program functionality in the header comment for the program

2. Variables and Constants.    All variables and constants in a program must be declared at the beginning of the program

3. Initialization.   Variables may not be initialized in their declaration.

4. Printing of if-then.   Use one of the following

     if (expression) statement

     if (expression)

        Single-statement

     if (expression) {

        Multiple-statements

     }

5. Printing of if-then-else. Use one of the following

     if (expression) statement

     else            statement

     if (expression)

        Single-statement

     else

        Single-statement

     if (expression) {

        Multiple-statements

     } else {

        Multiple-statements

           }

6. Printing of while loops.   Use one of the following

     while (expression) statement

     while (expression)

        Single-statement

     while (expression) {

        Multiple-statements

     }

7. For loops.   The bodies of all for-loops must be indented at least 3 (but no more than 5) spaces:

    for(int i = 0; i < n; i++) {

       cout << "Enter the number:" << flush;

       cin >> num;

       if (num < 0)      num_neg++;

       else if (num > 0) num_pos++;

       else              num_zero++;

    }

8. Methods.   The bodies of all functions must be indented at least 3 (but no more than 5) spaces:

double CircleArea(double r) {

         const double Pi = 3.1415;

           return Pi * r * r;

      }   

Answer 1

#include <iostream>
#include <iomanip>
using namespace std;

void reverse(int A[], int size){
   for(int i = 0; i < size / 2; i++){
       int temp = A[i];
       A[i] = A[size - i - 1];
       A[size - i - 1] = temp;
   }
}
int main(){
int arr[1000], count = 0;
double average = 0.0;
   cout << "Please enter the integers: ";
while(true){
   cin >> arr[count];
   if(arr[count] == -1) break;
   count++;
}
reverse(arr, count);
cout << "The values in reverse order are\n\t";
for(int i = 0; i < count; i++){
   cout << arr[i] << " ";
average += arr[i];
}
average /= count;
cout << fixed << setprecision(1);
cout << "\nThe average is " << average << endl;
}

hacker@Hacker:-/DesktopS g++ a.cpp hacker@Hacker:-/Desktop$ ./a.out 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 hacker@Hacker/Desktop$