void printData(Sample *data, int size) {  
    if (data == NULL) {  
        printf("Sample is empty!\n");  
        return;  
    }  
  
    for (int i = 0; i < size; i++) {  
        printf("Input 1: %f, Input 2: %f, Output: %f\n", data[i].in[0], data[i].in[1], data[i].out[0]);  
    }  
}