#include const int NUMBER_OF_PLANTS = 4; void input_data(int a[], int last_plant_number); void scale(int a[], int size); void graph(const int asterisk_count[], int last_plant_number); int main() { using namespace std; int production[NUMBER_OF_PLANTS]; cout << " This progream displays a graph showing\n" << "production for each plant in the company.\n"; input_data(production, NUMBER_OF_PLANTS); scale(production, NUMBER_OF_PLANTS); graph(production, NUMBER_OF_PLANTS); return 0; } void input_data(int a[], int last_plant_number) { } void scale(int a[], int size) { } void graph()