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About C

C is a general-purpose, procedural computer programming language supporting structured programming, lexical variable scope, and recursion, with a static type system.

About C#

C# is a general-purpose, multi-paradigm programming language encompassing strong typing, lexically scoped, imperative, declarative, functional, generic, object-oriented, and component-oriented programming disciplines.

Palindrome Check Example: C vs C#

Palindrome Check in C

#include <stdio.h>
#include <string.h>
#include <ctype.h>

int isPalindrome(export const char* str) {
    char clean[1000];
    int j = 0;
    
    // Clean the string
    for(int i = 0; str[i]; i++) {
        if(isalnum(str[i])) {
            clean[j++] = tolower(str[i]);
        }
    }
    clean[j] = '\0';
    
    // Check palindrome
    int left = 0;
    int right = strlen(clean) - 1;
    while(left < right) {
        if(clean[left] != clean[right]) return 0;
        left++;
        right--;
    }
    return 1;
}

int main() {
    printf("%d\n", isPalindrome("A man, a plan, a canal: Panama")); // 1
    printf("%d\n", isPalindrome("race a car")); // 0
    return 0;
}

Palindrome Check in C#

using System;
using System.Linq;

class Program {
    static bool IsPalindrome(string str) {
        string clean = new string(str.ToLower()
            .Where(c => Char.IsLetterOrDigit(c))
            .ToArray());
        return clean.SequenceEqual(clean.Reverse());
    }
    
    static void Main() {
        Console.WriteLine(IsPalindrome("A man, a plan, a canal: Panama")); // True
        Console.WriteLine(IsPalindrome("race a car")); // False
    }
}

Bubble Sort Example: C vs C#

Bubble Sort in C

#include <stdio.h>

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

int main() {
    int arr[] = {64, 34, 25, 12, 22, 11, 90};
    int n = sizeof(arr)/sizeof(arr[0]);
    
    bubbleSort(arr, n);
    
    for(int i = 0; i < n; i++) {
        printf("%d ", arr[i]);
    }
    return 0;
}

Bubble Sort in C#

using System;

class Program {
    static void BubbleSort(int[] arr) {
        int n = arr.Length;
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < n - i - 1; j++) {
                if (arr[j] > arr[j + 1]) {
                    int temp = arr[j];
                    arr[j] = arr[j + 1];
                    arr[j + 1] = temp;
                }
            }
        }
    }
    
    static void Main() {
        int[] arr = { 64, 34, 25, 12, 22, 11, 90 };
        BubbleSort(arr);
        Console.WriteLine(string.Join(" ", arr));
    }
}

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