chore(samples): add C code sample (#2244)

This commit introduces a C code snippet.

samples/c.c

@@ -0,0 +1,84 @@
+/*
+ * BLOCK COMMENT
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+// Structure representing a rectangle
+struct Rectangle {
+    float length;
+    float width;
+};
+
+// Structure representing a circle
+struct Circle {
+    float radius;
+};
+
+// Union to store either a rectangle or a circle
+union ShapeUnion {
+    struct Rectangle rectangle;
+    struct Circle circle;
+};
+
+// Function to calculate the area of a rectangle
+float calculateRectangleArea(struct Rectangle rect) {
+    return rect.length * rect.width;
+}
+
+// Function to calculate the area of a circle
+float calculateCircleArea(struct Circle circle) {
+    return 3.14159 * circle.radius * circle.radius;
+}
+
+int main() {
+    // Union to store either a rectangle or a circle
+    union ShapeUnion myShape;
+
+    // User input to choose shape
+    int choice;
+    printf("Enter 1 for Rectangle or 2 for Circle: ");
+    scanf("%d", &choice);
+
+    // Dynamically allocate memory based on user choice
+    if (choice == 1) {
+        // User chose rectangle
+        myShape.rectangle.length = 5.0;
+        myShape.rectangle.width = 3.0;
+    } else if (choice == 2) {
+        // User chose circle
+        myShape.circle.radius = 4.0;
+    } else {
+        // Invalid choice
+        printf("Invalid choice.\n");
+        return 1;
+    }
+
+    // Calculate and display area based on user's choice
+    if (choice == 1) {
+        printf("Area of the rectangle: %.2f\n", calculateRectangleArea(myShape.rectangle));
+    } else if (choice == 2) {
+        printf("Area of the circle: %.2f\n", calculateCircleArea(myShape.circle));
+    }
+
+    // Dynamic memory allocation example
+    int* dynamicArray = (int*)malloc(5 * sizeof(int));
+    if (dynamicArray == NULL) {
+        printf("Memory allocation failed.\n");
+        return 1;
+    }
+
+    // Populate and display dynamic array
+    printf("Dynamic Array: ");
+    for (int i = 0; i < 5; i++) {
+        dynamicArray[i] = i + 1;
+        printf("%d ", dynamicArray[i]);
+    }
+    printf("\n");
+
+    // Free dynamically allocated memory
+    free(dynamicArray);
+
+    return 0;
+}