Array

#include <iostream>
using namespace std;

void nhap_mang(int a[], int &n)
{
    cout << "Nhap so phan tu cua mang: ";
    cin >> n;
    for (int i = 0; i < n; i++)
    {
        cout << "Nhap phan tu arr[" << i + 1 << "] = ";
        cin >> a[i];
    }
}

void xuat_mang(int a[], int n)
{
    for (int i = 0; i < n; i++)
        cout << "arr[" << i + 1 << "] = " << a[i] << endl;
}

void liet_ke(int a[], int n, int k)
{
    for (int i = 0; i < n; i++)
    if (a[i] == k)
        cout << i << "\t";
}

void nhap_mang_2c(int a[][100], int &n, int &m)
{
    cout << "Nhap n: ";
    cin >> n;
    cout << "Nhap m: ";
    cin >> m;

    for (int i = 0; i < m; i++)
    {
        for (int j = 0; j < n; j++)
        {
            cout << "arr[" << i << "][" << j << "] = ";
            cin >> a[i][j];
        }
    }
}


void xuat_mang_2c(int a[][100], int n, int m)
{
    for (int i = 0; i < m; i++)
    {
        for (int j = 0; j < n; j++)
        {
            cout << a[i][j] << "\t";
        }
        cout << "\n";
    }
}

void main()
{
    // khai bao mang a kieu int kich thuoc la 1000
    int arr[1000];
    // khai bao mang 2 chieu
    int arr2[100][100];
    // chi so mang trong c danh tu 0 di
    // n - 1 la chi so phan tu cuoi cung

    int n, m;

    nhap_mang_2c(arr2, n, m);
    xuat_mang_2c(arr2, n, m);
}