我收到此错误,但我不明白,因为从未在 DisplayErrorMessage.cpp 中声明“int const ITEMS”,就像它在下面的错误中所说的那样......任何帮助。
1>Main.obj : error LNK2005: "int const ITEMS" (?ITEMS@@3HB) already defined in DisplayErrorMessage.obj
1>MakeSelection.obj : error LNK2005: "int const ITEMS" (?ITEMS@@3HB) already defined in DisplayErrorMessage.obj
1>ShowMenu.obj : error LNK2005: "int const ITEMS" (?ITEMS@@3HB) already defined in DisplayErrorMessage.obj
1>c:\users\kanaan\documents\visual studio 2010\Projects\Assign2\Debug\Assign2.exe : fatal error LNK1169: one or more multiply defined symbols found
这是代码:
头文件
#ifndef _VENDINGMACHINE_H_
#define _VENDINGMACHINE_H_
#include <iostream>
#include <cmath>
#include <string>
using namespace std;
//extern int Denominations;
extern int const ITEMS = 9;
extern int Coins[5];
extern int NumCoins[5]; //assume we have 10 coins of each denomination
extern int ItemPrice[ITEMS ]; //price in cents
extern int NumItems[ITEMS];
//extern double Total_Price;
//extern double Item_Total;
class VendingMachine{
public:
void MakeSelection();
int ReturnChange(int change, int Coins[], int NumCoins[]);
void ShowMenu();
void DisplayErrorMessage(int error);
void PrintConfidentialInformation(int Denominations, int Items, int Coins[],
int NumCoins[], int ItemPrice[] , int NumItems[]);
private:
int selection;
string code;
double Each_Item[ITEMS]; //price for each item
};
#endif //_VENDING_MACHINE_H_
cpp 文件如下。MakeSelection.cpp #include "自动售货机.h"
void VendingMachine::MakeSelection(){
//assume we have 10 coins of each denomination
double Total_Price;
// double Item_Total;
int Coins[5] = {100, 50, 20, 10, 5};
int NumCoins[5] = {10, 10, 10, 10, 10};
int ItemPrice[ITEMS] = { 75, 120, 120, 100, 150, 95, 110, 50, 120 }; //price in cents
int NumItems[ ITEMS] = { 10, 10, 10, 10, 10, 10, 10, 10, 10 };
string Product[ITEMS] = {"Water","Coke","Diet Coke","Iced Tea","Swiss Chocolate","Candy",
"Chips","Bubble Gum","Turkish Delight"};
int b = 0;
int a = 1;
cout << "Please enter the number of your choice from the menu above. " << endl;
do{
cout << "\nEnter the number of product OR End transaction: " << endl;
cin >> selection;
cout << "\nYou have selected " <<Product[selection] << endl;
if(selection >= 1 && selection <= 9){
NumItems[selection - 1] = NumItems[selection - 1] - 1;
if(NumItems[selection - 1] >= 0)
Total_Price = Total_Price + ItemPrice[selection - 1];
else{
int error = 1;
DisplayErrorMessage(error); //Item finised
cout <<selection<< endl;
}
}
else if(selection == 10)
cout << "\nTransaction Ended" << endl;
else if(selection == 99){
cout << "Enter the code to access maintanance: " <<endl;
cin >> code;
while(code != "111"){
int error = 2;
DisplayErrorMessage(error);
cin >> code;
}
cout << endl;
cout << "\t\t\t\t\tSales Report " << endl;
cout << "==================================================== " << endl;
cout << endl;
cout << "Number of each product sold with Income cost: " << endl;
cout << endl;
do{
if(NumItems[b] >= 0){
Each_Item[b] = Each_Item[b] + ItemPrice[b];
cout << NumItems[b] << "" << Product[b] << " sold for the total cost of " <<(10 - NumItems [b]) * Each_Item[b]/ 100 <<endl;
Total_Price = Total_Price + ((10 - NumItems[b]) * Each_Item[b]/100);
}
b++;
}while(a <= ITEMS);
}
else{
int error = 3;
DisplayErrorMessage(error);
}
}while(selection != 10);
}
显示错误消息.cpp
#include "Vending Machine.h"
void VendingMachine::DisplayErrorMessage(int error){
if (error == 1){
cout << "\nSorry we are run out of item number ";
}
else if (error == 2){
cout << "\nInvalid selection - Please re-select your choice" << endl;
}
else if (error == 3){
cout << "\nIncorrect Password - Please re-enter" << endl;
}
else
cout << "\nNot enough fund" << endl;
}
帮助普利兹。