int main() {
    printf('Hello, World!');
    return 0;
}

int main() {
    int a = 10;
    int b = 20;
    printf('%d', a+b);
    return 0;
}

int main() {
    int arr[5] = {1, 2, 3, 4, 5};
    for (int i = 0; i < 5; i++) {
        printf('%d ', arr[i]);
    }
    return 0;
}

#include 
void *printHello(void *threadid) {
    printf('Hello from thread %d', threadid);
    pthread_exit(NULL);
}
int main() {
    pthread_t threads[5];
    for(int i = 0; i < 5; i++) {
        pthread_create(&threads[i], NULL, printHello, (void *)i);
    }
    return 0;
}

typedef struct {
    int x;
    int y;
} Point;

int main() {
    Point p1 = {1, 2};
    printf('Point p1: x = %d, y = %d', p1.x, p1.y);
    return 0;
}

int main() {
    int a = 10;
    int *p = &a;
    printf('%d', *p);
    return 0;
}