Two Dimensional Array in Cpp language

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Two dimensional Array in Cpp language

In this article, we will discuss the Two Dimensional Array in Cpp language.

In this post, we will learn how to access the Two Dimensional Array in Cpp language(how to input elements and how to display it)

Knowledge Area

What is Array
Type of Arrays
Declaration of two dim Array in C++
Two dim Array Initialization in C++
Two dim Array processing in C++

In the Cpp programming Language, an array is a fixed sequenced collection of the element of the same data types. an array can be used to represent a list of number(int, float, double, etc) or name (string) or other data type of similar elements. It is one of the ways of simply a grouping of similar type data of single variables names.

Three types of arrays are in the C++ programming language

1. One dimensional array
2. Two-dimensional array
3. multidimensional array

Two dimensional Array

Declaration of Two dim Array

Syntax

return_type Array_name[size][size];

Example

int marks[4][6];
char alphabet[3][4];

This declare is two dimension array in c have 4 rows and 6 coloum

2 D array

Initializing Two dim Array

Initializing standard method

Example

#include <iostream>
#include <conio.h>

using namespace std;
int main()
{
    int marks[3][3];//array declaration

    marks[0][0]=78;  //initialization of array of array
    marks[0][1]=68;
    marks[0][2]=35;
    marks[1][0]=79;
    marks[1][1]=52;
    marks[1][2]=49;
    marks[2][0]=45;
    marks[2][1]=73;
    marks[2][2]=63;

    //Display elements
    cout << "Array elements display here\n" << endl;
    cout << marks[0][0] << endl;
    cout << marks[0][1] << endl;
    cout << marks[0][2] << endl;
    cout << marks[1][0] << endl;
    cout << marks[1][1] << endl;
    cout << marks[1][2] << endl;
    cout << marks[2][0] << endl;
    cout << marks[2][1] << endl;
    cout << marks[2][2] << endl;
    getch();
    return 0;
}

When the above code executed, it produces the following result

Output

Initializing during declaration

int marks[2][3]=
{50,71,42,53,36,58};

int marks[2][3]=

{{50,71,42},{53,36,58}};
different way to initialize two dimensional Array

int marks[2][3]={{50,46,57}{78,63,84}}

float height[ ][3]={{124.5,146.8,157.3}{178.9,163.0,154.6}}

Example 1

#include <iostream>

using namespace std;

int main()
{ int marks[2][5]={{17,56,47,53,78},{37,46,67,83,98}};
cout << marks[0][0] << endl;
cout << marks[0][1] << endl;
cout << marks[0][2] << endl;
cout << marks[0][3] << endl;
cout << marks[0][4] << endl;
cout << marks[1][0] << endl;
cout << marks[1][1] << endl;
cout << marks[1][2] << endl;
cout << marks[1][3] << endl;
cout << marks[1][4] << endl;
return 0;

}
When the above code executed, it produces the following result

Output

Initializing and displaying elements using loops

Using for loops

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int arr[3][3],i,j;

    cout << "Enter the numbers for 2 D array" << endl;
    for(i=0; i<3; i++){//Enter array elements using for loop
        for(j=0; j<3; j++){
        cin>>arr[i][j];//store array elements
    }
    }

    cout << "\nYour entered elements display here\n" << endl;
    for(i=0; i<3; i++){
        for(j=0; j<3; j++){//display the array elements using for loop
        cout << "you entered to index arr["<<i<<"]["<<j<<"]: "<<arr[i][j] <<endl;
    }
    }
    getch();
    return 0;
}

When the above code executed, it produces the following result

Output

Using while loops

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int arr[3][3],i,j;

    cout << "Enter the numbers for 2 D array" << endl;
    i=0;
    while(i<3){
            j=0;
        while(j<3){
        cin>>arr[i][j];//store array elements
    j++;
    }
     i++;
    }

    cout << "\nYour entered elements display here\n" << endl;
    i=0;
    while(i<3){
            j=0;
        while(j<3){//display the array elements
        cout << "you entered to index arr["<<i<<"]["<<j<<"]: "<<arr[i][j] <<endl;
     j++;
    }
     i++;
    }
    getch();
    return 0;
}

When the above code executed, it produces the following result

Output

Using do-while loops

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int arr[3][3],i,j;

    cout << "Enter the numbers for 2 D array" << endl;
    i=0;
    do{
            j=0;
        do{
        cin>>arr[i][j];//store array elements
    j++;
    }while(j<3);
     i++;
    }while(i<3);

    cout << "\nYour entered elements display here\n" << endl;
    i=0;
    do{
            j=0;
        do{//display the array elements
        cout << "you entered to index arr["<<i<<"]["<<j<<"]: "<<arr[i][j] <<endl;
     j++;
    }while(j<3);
     i++;
    }while(i<3);
    getch();
    return 0;
}

When the above code executed, it produces the following result

Output

One dim Array in Java One dim Array in C++ One dime Array in C

Two dim Array in Java Two dim Array in C++ Two dim Array in C

Three dim Array in Java Three dim Array in C++ Three dim Array in C

Array programs c++ language