8v.cpp

《C/C＋＋程序设计导论（第二版）》一书的程序源文件

// drugtest.cpp  Compare new prescription with currently
//  prescribed meds for illegal and dangerous combinations.
// ASSUMPTION: the files "patients.txt" and "drugs.txt" exist.
#include <iostream.h>
#include <fstream.h>
const int END = -1;

void main ()
{	int patID, newdrug, contradrug;
	ifstream patfile ("patients.txt", ios::in);	// patient records
	ifstream drugfile ("drugs.txt", ios::in);	// drug records
	ofstream outfile ("temp.txt", ios::out);	// list of current meds

	cout << "enter patient ID and drug number: ";
	cin >> patID >> newdrug;

// Make a list of the current medications for this patient in file "temp.txt"
	MakeList (patID, patfile, outfile);
	outfile.close();
// Find the new drug in the "drugs.txt" database file
	FindDrug (drugfile, newdrug);
// Search the contra-indicated drugs for each drug the patient is taking ("temp.txt')
	if (drugfile)
		if (drugfile >> contradrug)
		  while (contradrug > 0)
		  {	if (CurrentlyTaking (contradrug))
					cout << "*WARNING; drug interaction possible!"<< endl;
			  drugfile >> contradrug;
		  }
}