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C Programming in VS Code

Printing a message in C

Beginner's Guide to Keywords, Identifiers, Constants, Variables, Datatypes in C

Operators & Expressions in C

Input & Output Operations in C

Control Statements in C

Loops in C

Array in C

Character Array & Strings in C

User Defined Functions in C

Structure and Union in C

Pointers in C

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Download Notes

Array in C

Array: It is a fixed-size sequence collection part of elements of the same data type.

Types of array:

1) One-Dimensional Array: It is a list of items that has one variable name and one subscript to access the items.

2) Two-Dimensional Array: It is an array of arrays that has two subscripts for accessing its values. It is used to represent table or matrix data.

3) Multi-Dimensional Array: It is an array with more than one dimension. Examples are 2d, 3d, and so on.

Static Array: These are the arrays declared using the static memory allocation technique.

Static Memory Allocation: It is the process of allocating memory at compile time.

Dynamic Array: These are the arrays declared using the dynamic memory allocation technique.

Dynamic Memory Allocation: It is the process of allocating memory at run time.

Searching: It is the process of finding the location of the specified element in the list.

Sorting: It is the process of rearranging elements in the list in ascending or descending order.

Array in C

Searching:

searching.c


#include <stdio.h>

void main()
{
    int array_of_numbers[5], i, number_to_be_searched;
    printf("Enter the numbers of the list: ");
    for (i = 0; i < 5; i++) {
        scanf("%d", &array_of_numbers[i]);
    }
    printf("\nEnter the number to search in list: ");
    scanf("%d", &number_to_be_searched);
    for (i = 0; i < 5; i++) {
        if (array_of_numbers[i] == number_to_be_searched) {
            printf("\nNumber found at %d location in list.", i + 1);
            break;
        }
    }
    if (i == 5) {
        printf("\nNumber not found in list.");
    }
}

Sorting:

sorting.c


#include <stdio.h>

void main()
{
    int array_of_numbers[5], i, j, temp;
    printf("Enter the numbers to sort: ");
    for (i = 0; i < 5; i++)
        scanf("%d", &array_of_numbers[i]);
    printf("\nYou entered: ");
    for (i = 0; i < 5; i++)
        printf("\t%d", array_of_numbers[i]);
    printf("\nSorted list: ");
    for (i = 0; i < 5; i++)
        for (j = 0; j < 4; j++) {
            if (array_of_numbers[j] > array_of_numbers[j + 1]) {
                temp = array_of_numbers[j];
                array_of_numbers[j] = array_of_numbers[j + 1];
                array_of_numbers[j + 1] = temp;
            }
        }
    for (i = 0; i < 5; i++)
        printf("\t%d", array_of_numbers[i]);
}

Two dimensional array:

two_d_array.c


#include <stdio.h>

void main()
{
    int matrix1[2][2], matrix2[2][2], product_matrix[2][2], i, j, k;
    printf("Enter the first matrix elements (rows, 2 x 2 matrix): ");
    for (i = 0; i < 2; i++)
        for (j = 0; j < 2; j++)
            scanf("%d", &matrix1[i][j]);
    printf("\nEnter the second matrix elements (rows, 2 x 2 matrix): ");
    for (i = 0; i < 2; i++)
        for (j = 0; j < 2; j++)
            scanf("%d", &matrix2[i][j]);
    printf("\nFirst matrix is:\n");
    for (i = 0; i < 2; i++) {
        for (j = 0; j < 2; j++)
            printf("%d\t", matrix1[i][j]);
        printf("\n");
    }
    printf("\nSecond matrix is:\n");
    for (i = 0; i < 2; i++) {
        for (j = 0; j < 2; j++)
            printf("%d\t", matrix2[i][j]);
        printf("\n");
    }
    printf("\nProduct matrix is:\n");
    for (i = 0; i < 2; i++)
        for (j = 0; j < 2; j++) {
            product_matrix[i][j] = 0;
            for (k = 0; k < 2; k++) {
                product_matrix[i][j] = product_matrix[i][j] + matrix1[i][k] + matrix2[k][j];
            }
        }
    for (i = 0; i < 2; i++) {
        for (j = 0; j < 2; j++)
            printf("%d\t", product_matrix[i][j]);
        printf("\n");
    }
}