C_KERNEL_ARCHIVE

#include <stdio.h>
#define PI 3.14159
#define SQR(x) ((x) * (x))

#ifdef DEBUG
    // Conditional Compilation
#endif
            

int core_id = 1024;
float voltage = 5.5f;
char signal = 'A';
double precision = 0.0000001;
unsigned short port = 8080;
long long big_data = 99999999LL;
            

int val = 42;
int *ptr = &val; // Address-of

printf("%d", *ptr); // Dereferencing

// Null Pointer
void *raw_mem = NULL;
            

// Allocation on Heap
int *arr = (int*)malloc(5 * sizeof(int));

if (arr != NULL) {
    free(arr); // Prevent memory leaks
}

// calloc (initialized to zero)
int *z_arr = (int*)calloc(5, sizeof(int));
            

struct User {
    int id;
    char name[20];
};

union Data {
    int i;
    float f; // Memory shared
};

typedef struct User Architect;
            

switch (signal) {
    case 'A': handle_active(); break;
    default: return 0;
}

// Pointer-based loop
while (*str_ptr != '\0') {
    str_ptr++;
}
            

static int persistent = 0;
extern int global_flag;
register int counter = 0; // CPU optimization
volatile int sensor = 0;  // Hardware mapped
            

FILE *fp = fopen("kernel.log", "w");
if (fp) {
    fprintf(fp, "Boot Sequence: %d", 1);
    fclose(fp);
}