I have this program,how to find reverse numbers?

```
#include<iostream>
#include<fstream>
#include<string>
using namespace std;
const int array_size = 10;
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//function to enter the number choise1/// to "&" dieuthinsi noumerou
void get_numbers(int num_arr[array_size], int& numbers){
int count;
cout << "How many numbers do you want to enter? "<<endl;
cin >> numbers;
cout << endl;
for (count = 0; count < numbers; count++){
cout << "Enter number " << count + 1 << ": ";
cin >> num_arr[count];
}
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//function to display the list of numbers
void display_numbers(int num[array_size], int numbers){
int count;
for (count = 0; count < numbers; count++)
cout << "Number " << count + 1 << " is: " << num[count] << endl;
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//function to save the numbers in a file
void savenumbers(int num_arr[array_size], int numbers){
int count;
ofstream myfilenumbers("numbers.txt");
if (!myfilenumbers)
{
cout << "file could not be open for writing ! " << endl;
}
for (count = 0; count < numbers; count++)
{
myfilenumbers << num_arr[count] <<endl;
}
myfilenumbers.close();
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//function to read from a file
void readfile(int nums_arr[array_size], int& num_of_nums){
num_of_nums = -1;
ifstream functionfile("numbers.txt");
if (!functionfile)
{
cout << "Error reading from file ! " << endl;
}
while (!functionfile.eof())
{
num_of_nums++;
functionfile >> nums_arr[num_of_nums] ;
cout << nums_arr[num_of_nums] << endl;
}
num_of_nums++;
functionfile.close();
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//function to search for a number
void search(int num[array_size]){
int count;
int numberforsearch;
int count2=0;
bool flag = false;
cout << "Please enter the number you want to find:";
cin >> numberforsearch;
for (count = 0; count <10; count++)
{
if (num[count] == numberforsearch)
{
flag = true; // turn flag on
count2++;
cout << "The number " << numberforsearch << " is found at position " << count + 1 << "." << endl;
}
}
if (flag){
cout << "The number " << numberforsearch << " is found " << count2 << " time(s)." << endl;
}
else cout << "The number is not in the list" << endl;
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//function to reversethe array
void reverse(int num[array_size])
{
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
////////////////////////////////
void main(){
bool flist = false;
int choice;
int nums_array[array_size];
int nums, count,numbers=0,s,avr,result = 0;
do{
system("CLS");
cout << "------------------------Menu----------------------------" << endl;
cout << "1. Read a list of numbers." << endl;
cout << "2. Display list." << endl;
cout << "3. Save list to File." << endl;
cout << "4. Load list from file." << endl;
cout << "5. Search for a given number in the list." << endl;
cout << "6. Reverse list." << endl;
cout << "7. Calculate the sum of the list" << endl;
cout << "8. Calculate the average of the list." << endl;
cout << "9. Find the largest number in the list" << endl;
cout << "10. Find the smallest number in the list." << endl;
cout << "11. Exit." << endl << endl;
cout << "Please select a choice" << ": ";
cin >> choice;
switch (choice)
{
case 1:flist = true;
get_numbers(nums_array,numbers);
break;
case 2:if (flist)
display_numbers(nums_array,numbers);
else{
cout << "The list is empty" << endl;
}
break;
case 3:savenumbers(nums_array,numbers);
cout << " then numbers is save" <<endl;
break;
case 4: readfile(nums_array,numbers);
flist = true;
break;
case 5:search(nums_array);
break;
case 6:reverse(nums_array);
break;
case 7:sum(nums_array);
cout << "The sum of the numbers is " << s << endl;
break;
case 8:average(nums_array);
//cout << "The average of the numbers is " << avr << endl;
break;
case 9:cout << "";
break;
case 10:cout << "";
break;
case 11:
break;
default:cout << "Please enter a valid choise." << endl;
}
system ("pause");
}
while (choice != 11);
}
```