int getValue() {
    return 42;
}

int add(int a, int b) {
    return a + b;
}

int square(int x) {
    int result = x * x;
    return result;
}

int max(int a, int b) {
    if (a > b) {
        return a;
    }
    return b;
}

int main() {
    printf("=== Functions Tests ===\n");
    printf("Testing no-parameter functions...\n");
    int val = getValue();
    printf("getValue() = %d\n", val);

    printf("Testing two-parameter functions...\n");
    int sum = add(5, 3);
    printf("add(5, 3) = %d\n", sum);

    printf("Testing functions with local variables...\n");
    int sq = square(7);
    printf("square(7) = %d\n", sq);

    printf("Testing conditional functions...\n");
    int m1 = max(15, 20);
    printf("max(15, 20) = %d\n", m1);

    printf("Testing nested function calls...\n");
    int nested = add(square(3), getValue());
    printf("add(square(3), getValue()) = %d\n", nested);

    printf("\n=== All Tests Completed ===\n");
    return 0;
}