minggu ke-5.Ebook 5.5 figur 5.9 program to monitor

 #include <cstdlib>
#include <iostream>
#define capacity 80000.0
#define min_pct 10
#define gals_per_brl 42.0

double monitor_gas(double min_supplay,double start_supply);

using namespace std;

int main(void)
{
    double start_supply, min_supply, current;
    min_supply = min_pct/100.0*capacity;
    cout<<"Number of barrels currently in tank> ";
    cin>>start_supply;
  
    current = monitor_gas(min_supply,start_supply);
    cout<<"only barrels are left."<<current<<endl<<endl;
    cout<<"*** WARNING ***"<<endl;
    cout<<"Available supply is less than percent of"<<min_pct<<"tank's "<<endl;
    cout<<capacity<<"barrel capacity."<<endl;
  

  
    system("PAUSE");
    return EXIT_SUCCESS;
}