C++ 程序将用户的十个数字放入一个数组并使用指针按顺序对数组进行排序

Question

Write a program that asks user to input 10 positive integer numbers, stores them in an array and then replaces the first element with the minimum number and the last element with the maximum number.

You must write 3 functions:

1. void getNumber(int *): inputs 10 positive integer numbers and stores them in an array.

2. void minMax(int *): finds the minimum and maximum numbers, and re-arranges the array.

3. printNumber(int *): prints the resulted new array.

Notes:
You MUST use POINTERS to access the array in all functions (failure to use pointer will result in 50% deduction).

It works, but I need the user input portion that's in main now, to be its own function too. I don't know how to do that!

#include <iostream>
using namespace std;

// Function to sort the numbers using pointers 
void sort(int n, int* ptr)
{
    int i, j, t;

    // Sort the numbers using pointers 
    for (i = 0; i < n; i++) {
        for (j = i + 1; j < n; j++) {
            if (*(ptr + j) < *(ptr + i)) {
                t = *(ptr + i);
                *(ptr + i) = *(ptr + j);
                *(ptr + j) = t;
            }
        }
    }
}

int print(int n, int *ptr) 
{
    for (int i = 0; i < n; i++)
        cout << *(ptr + i) << " " ;
    cout << endl;
    return *ptr + 1;
}

int main()
{
    //int n = 10;
    //int arr[] = { 0, 4, 74, 88, 12, 37, 12, 7, 65, 2 };

    const int SIZE = 10;
    int values[SIZE];
    int i;
    //user input
    cout << "Enter 10 numbers: ";
    for (i = 0; i < 10; ++i)
        cin >> values[i];
    //prints forward array
    cout << "You entered: ";
    for (i = 0; i < 10; ++i)
        cout << values[i] << " ";
    cout << endl;

    sort(i, values);
    cout << "The numbers in order are: ";
    print(i, values);

    system("pause");
    return 0;
}

Answer 1

Here is the code that factor the user input into a seperate function:

void FillInArrayFromInput(int* arr, int size) // take the pointer to first element of the array and the size
{
    cout << "Enter 10 numbers: ";
    for (int i = 0; i < size; ++i)
        cin >> arr[i]; // Edit: there was little typo here!
}

Now the main function will be:

int main()
{
    const int SIZE = 10;
    int values[SIZE];

    //user input
    FillInArrayFromInput(values, SIZE);

    //prints forward array
    cout << "You entered: ";
    for (i = 0; i < 10; ++i)
        cout << values[i] << " ";
    cout << endl;

    sort(i, values);
    cout << "The numbers in order are: ";
    print(i, values);

    system("pause");
    return 0;

}