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

// Global variables for testing
volatile int global_int = 0;
volatile long global_long = 1000L;
volatile unsigned int global_uint = 0U;

int main(int argc, char *argv[]) {
    printf("=== Sample Program for gwatch ===\n");

    // Test 1: Simple write
    printf("Test 1: Simple write\n");
    global_int = 42;
    printf("  global_int = %d\n", global_int);

    // Test 2: Multiple writes
    printf("Test 2: Multiple writes\n");
    global_int = 100;
    printf("  global_int = %d\n", global_int);
    global_int = 200;
    printf("  global_int = %d\n", global_int);

    // Test 3: Increment operation
    printf("Test 3: Increment\n");
    global_int++;
    printf("  global_int = %d\n", global_int);

    // Test 4: Arithmetic
    printf("Test 4: Arithmetic\n");
    global_int = global_int + 50;
    printf("  global_int = %d\n", global_int);

    // Test 5: Read operation (shouldn't show write)
    printf("Test 5: Read operation\n");
    int temp = global_int;
    printf("  Read value: %d\n", temp);

    // Test 6: Long variable operations
    printf("Test 6: Long variable\n");
    global_long = 5000L;
    printf("  global_long = %ld\n", global_long);
    global_long += 2500L;
    printf("  global_long = %ld\n", global_long);

    // Test 7: Unsigned int operations
    printf("Test 7: Unsigned int\n");
    global_uint = 999U;
    printf("  global_uint = %u\n", global_uint);

    // Test 8: Command-line argument handling
    if (argc > 1) {
        printf("Test 8: With command-line args\n");
        int arg_val = atoi(argv[1]);
        global_int = arg_val;
        printf("  global_int = %d (from arg)\n", global_int);
    }

    printf("=== Program Complete ===\n");
    return 0;
}