Sorting.c

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

void selectionSort(int arr[], int n) {
    int min, temp;
    for (int i = 0; i < n-1; i++) {
        min = i;
        for (int j = i+1; j < n; j++) {
            if (arr[min] > arr[j]) {
                min = j;
            }
        }
        temp = arr[i];
        arr[i] = arr[min];
        arr[min] = temp;
    }
}

void insertionSort(int arr[], int n) {
    int key, j;
    for (int i = 1; i < n; i++) {
        key = arr[i];
        j = i - 1;
        while (j >= 0 && arr[j] > key) {
            arr[j + 1] = arr[j];
            j = j - 1;
        }
        arr[j + 1] = key;
    }
}

void bubbleSort(int arr[], int n) {
    int temp;
    for (int i = 0; i < n-1; i++) {
        for (int j = 0; j < n-i-1; j++) {
            if (arr[j] > arr[j + 1]) {
                temp = arr[j];
                arr[j] = arr[j + 1];
                arr[j + 1] = temp;
            }
        }
    }
}

void printArray(int arr[], int n) {
    for (int i = 0; i < n; i++) {
        printf("%d ", arr[i]);
    }
    printf("\n");
}

int main() {
    int n, choice;
    printf("Enter the number of elements: ");
    scanf("%d", &n);

    int arr[n];
    printf("Enter the elements of the array: \n");
    for (int i = 0; i < n; i++) {
        scanf("%d", &arr[i]);
    }

    printf("Original array: \n");
    printArray(arr, n);

    printf("Choose a sorting method:\n");
    printf("1. Selection Sort\n");
    printf("2. Insertion Sort\n");
    printf("3. Bubble Sort\n");
    printf("Enter your choice: ");
    scanf("%d", &choice);

    clock_t start, end;
    double cpu_time_used;

    start = clock();
    switch (choice) {
        case 1:
            selectionSort(arr, n);
            printf("Array sorted using Selection Sort: \n");
            break;
        case 2:
            insertionSort(arr, n);
            printf("Array sorted using Insertion Sort: \n");
            break;
        case 3:
            bubbleSort(arr, n);
            printf("Array sorted using Bubble Sort: \n");
            break;
        default:
            printf("Invalid choice\n");
            return 1;
    }
    end = clock();
    cpu_time_used = ((double) (end - start)) / CLOCKS_PER_SEC;

    printArray(arr, n);
    printf("Time taken to sort the array: %f seconds\n", cpu_time_used);

    return 0;
}