Two Dimensional Array in C language

Two dimensional Array in C language

Knowledge Area

In the C 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) or name (string) or other data type of similar elements. It is one of the ways of the grouping of similar types of data of single variables names.

Three types of arrays in C programming language

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

Two dimensional Array

Declaration of Two dim Array

Syntex

retuen_type Array_name[size][size];

Example

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

This declare is a 2-dimensional array in c have 4 rows and 6 columns

Initializing 2 dim Array

Initializing-using standard method

Syntax

array_name[row_index][column_index]=value;

Example

arr[0][0]=65; //first element of an array

number 65 placed to address of arr[0][0]

Example

#include <stdio.h>
#include <stdlib.h>

int main()
{

    int marks[2][3];//declaration of 2 D array

     //initializing using stranded method
    marks[0][0]=23;
    marks[0][1]=33;
    marks[0][2]=56;
    marks[1][0]=76;
    marks[1][1]=58;
    marks[1][2]=37;

    //display element
    printf("Here, student marks\n");
    printf("%d\n",marks[0][0]);
    printf("%d\n",marks[0][1]);
    printf("%d\n",marks[0][2]);
    printf("%d\n",marks[1][0]);
    printf("%d\n",marks[1][1]);
    printf("%d\n",marks[1][2]);

    printf("End program!\n");
    getch();
    return 0;
}

The above code is executed, it produces the following result

 

Initilaize during the declaration

int marks[4][6]={
{50,71,42,53,36,58}    // initialize for row index by 0
{96,68,93,46,32,21}    // initialize for row index by 1
{40,71,62,73,57,70}      // initialize for row index by 2
{30,11,22,33,47,100}    // initialize for row index by 3
};

different way to initialize 2 dim 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 <stdio.h>
#include <stdlib.h>

int main()
{
    int array[4][4]={
    {10,34,56,74},
    {400,674,946,604},
    {40,64,96,64},
    {440,684,936,614}
    };
    int i,j;
    for(i=0; i<4; i++)
    {
        for(j=0; j<4; j++)
        {
            printf(“array[%d][%d]:%dn”,i,j,array[i][j]);
        }
    }

    return 0;

}

 

Initialize and display using loops

Initialize and display elements using for loop

Example 2

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int arr[3][3];
    //2D array declaration
    int i,j;//counter variable for the for loop
    printf("Enter the value for 2 D array\n");
    for(i=0; i<=2; i++){
        for(j=0; j<=2; j++){
    printf("Enter the value for arr[%d][%d]: ",i,j);
    scanf("%d",&arr[i][j]);
    //store the entered elements to array
        }
    }
    //Displaying array element
    printf("\nYour entered values here\n");
    for(i=0; i<=2; i++){
    for(j=0; j<=2; j++){
        printf("%d\t",arr[i][j]);
        }
        printf("\n");
    }
    getch();

    return 0;
}

 

Initialize and display elements using the while loop

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int arr[3][3];
    //2D array declaration
    int i,j;//counter variable for the while loop
    printf("Enter the value for 2 D array\n");
    i=0;
    while(i<=2){
            j=0;
        while(j<=2){
    printf("Enter the value for arr[%d][%d]: ",i,j);
    scanf("%d",&arr[i][j]);
    //store the entered elements to array
    j++;
        }
         i++;
    }
    //Displaying array element
    printf("\nYour entered values here\n");
    i=0;
    while(i<=2){
            j=0;
    while( j<=2){
        printf("%d\t",arr[i][j]);
    j++;
        }
        printf("\n");
         i++;
    }
    getch();

    return 0;
}

 

Program

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

Initialize and display elements using the do-while loop

#include <stdio.h>
#include <stdlib.h>
int main()
{
    int arr[3][3];//2D array declaration
    int i,j;//counter variable for the do-while loop
    printf("Enter the value for 2 D array\n");
    i=0;
    do{
            j=0;
        do{
    printf("Enter the value for arr[%d][%d]: ",i,j);
    scanf("%d",&arr[i][j]);
    //store the entered elements to array
    j++;}while(j<=2);
         i++;}while(i<=2);
    //Displaying array element
    printf("\nYour entered values here\n");
    i=0;
    do{
            j=0;
    do{
        printf("%d\t",arr[i][j]);
    j++;
        }while( j<=2);
        printf("\n");
         i++;
    }while(i<=2);
    getch();
    return 0;
}

Program

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

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

2 dim Array in  Java       2 dim Array in  C++      2 dim Array in  C

3 dim Array in  Java   3 dim Array in  C++    3 dim Array in  C