Merge pull request #217 from ashukr07/main

Added code snippets of C++ on bit manipulation, math & number, searching, sorting

Author: Mathys-Gasnier

snippets/c/bit-manipulation/check-power-of-two.md

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+---
+title: Check Power of Two
+description: Checks if a given number is a power of two using bitwise operations.
+tags: bit-manipulation, power-of-two
+author: ashukr07
+---
+
+```c
+#include <stdbool.h> // Include the standard boolean library
+
+bool is_power_of_two(int n) {
+    return n > 0 && (n & (n - 1)) == 0; // Bitwise check for power of two
+}
+
+// Usage:
+is_power_of_two(16); // Returns: true
+is_power_of_two(18); // Returns: false
+```

snippets/c/bit-manipulation/reverse-bits.md

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+---
+title: Reverse Bits
+description: Reverses the bits of a given unsigned integer.
+tags: bit-manipulation, reverse-bits
+author: ashukr07
+---
+
+```c
+unsigned int reverse_bits(unsigned int n) {
+    unsigned int result = 0;
+    for (int i = 0; i < 32; ++i) {
+        result <<= 1;        // Shift result left by 1
+        result |= n & 1;     // Add the least significant bit of n to result
+        n >>= 1;            // Shift n right by 1
+    }
+    return result;
+}
+
+// Usage:
+reverse_bits(43261596); // Returns: 964176192 (Binary: 00000010100101000001111010011100 -> 00111001011110000010100101000000)
+```

snippets/c/bit-manipulation/xor-of-range.md

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+---
+title: XOR of Range
+description: Finds XOR of all numbers from 1 to n using properties of XOR.
+tags: bit-manipulation, xor
+author: ashukr07
+---
+
+```c
+int xor_upto_n(int n) {
+    if (n % 4 == 0) return n;
+    if (n % 4 == 1) return 1;
+    if (n % 4 == 2) return n + 1;
+    return 0;
+}
+
+// Usage:
+xor_upto_n(5); // Returns: 1 (1 ^ 2 ^ 3 ^ 4 ^ 5 = 1)
+```

snippets/c/mathematical-functions/check-perfect-number.md

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+---
+title: Check Perfect Number
+description: Checks if a number is a perfect number. A perfect number is a positive integer that is equal to the sum of its proper divisors (excluding itself).
+tags: math, perfect-number
+author: ashukr07
+---
+
+```c
+#include <stdbool.h>
+
+// Function to check if a number is a perfect number
+bool is_perfect(int n) {
+    if (n <= 1) return false;
+
+    int sum = 1; // 1 is a divisor for all n > 1
+    for (int i = 2; i * i <= n; ++i) {
+        if (n % i == 0) {
+            sum += i;
+            if (i != n / i) sum += n / i;
+        }
+    }
+    return sum == n;
+}
+
+// Usage
+is_perfect(28); // Returns: true
+is_perfect(12); // Returns: false
+```

snippets/c/mathematical-functions/compound-interest.md

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+---
+title: Compound Interest
+description: Calculates the compound interest for a given principal, rate, time, and number of times interest applied per time period.
+tags: math, finance
+author: ashukr07
+---
+
+```c
+#include <math.h>
+
+// Function to calculate compound interest
+double compound_interest(double principal, double rate, double time, int n) {
+    return principal * pow(1 + rate / n, n * time);
+}
+
+// Usage:
+double principal = 1000.0;  // Initial amount
+double rate = 0.05;         // Annual interest rate (5%)
+double time = 2;            // Time in years
+int n = 4;                  // Compounded quarterly
+
+compound_interest(principal, rate, time, n); // Returns: 1104.081632653061
+```

snippets/c/mathematical-functions/fibonacci-number.md

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+---
+title: Fibonacci Number
+description: Calculates the nth Fibonacci number using recursion.
+tags: math, fibonacci, recursion
+author: ashukr07
+---
+
+```c
+// Function to calculate the nth Fibonacci number
+int fibonacci(int n) {
+    if (n <= 1) return n;
+    return fibonacci(n - 1) + fibonacci(n - 2);
+}
+
+// Usage:
+fibonacci(6); // Returns: 8
+```

snippets/c/mathematical-functions/sum-of-digits.md

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+---
+title: Sum of Digits
+description: Calculates the sum of the digits of an integer.
+tags: math, digits
+author: ashukr07
+---
+
+```c
+// Function to calculate the sum of the digits of an integer
+int sum_of_digits(int n) {
+    int sum = 0;
+    while (n != 0) {
+        sum += n % 10;
+        n /= 10;
+    }
+    return sum;
+}
+
+// Usage:
+sum_of_digits(123); // Returns: 6
+```

snippets/cpp/bit-manipulation/find-non-repeating-number.md

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+---
+title: Find Non-Repeating Number
+description: Finds the number that appears only once in an array where every other number appears twice.
+tags: bit-manipulation, xor
+author: ashukr07
+---
+
+```cpp
+int find_non_repeating(const std::vector<int>& nums) {
+    int result = 0;
+    for (int num : nums) {
+        result ^= num;
+    }
+    return result;
+}
+
+// Usage:
+std::vector<int> nums = {4, 1, 2, 1, 2};
+find_non_repeating(nums); // Returns: 4
+```

snippets/cpp/debuging/vector-print.md

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+---
+title: Binary to Decimal Conversion
+description: Converts a binary number represented as a string to its decimal equivalent.
+tags: binary, conversion
+author: ashukr07
+---
+
+```cpp
+int binary_to_decimal(const std::string& binary) {
+    int decimal = 0;
+    int base = 1; // Base value for the least significant bit
+
+    for (int i = binary.length() - 1; i >= 0; --i) {
+        if (binary[i] == '1') {
+            decimal += base;
+        }
+        base *= 2; // Move to the next power of 2
+    }
+    return decimal;
+}
+
+// Usage:
+std::string binary = "1011"; // Binary representation of 11
+binary_to_decimal(binary);   // Returns: 11
+```