Programming  »   [need help] C++ Undefined references

i hv homework....

Write a program to define a structure with 5 records named CustomerRecord which contains name, account_number and balance. You should create 2 functions to read and print the content of the structure. Use arrays to save the 5 records.


and i try to answer...

#include <iostream>
using namespace std;

struct CustomerRecord
{
string name;
int account_number;
double balance;
}a[5];

void read(CustomerRecord);
void print(CustomerRecord);
int main ()
{
CustomerRecord a[5];
read(a[5]);
print(a[5]);
system("pause");
return 0;
}
void read(CustomerRecord a[])
{
for (int i=0; i<5; i++)
{
cout << "Name : ";
getline(cin, a[i].name);
cout << "Account Number : ";
cin >> a[i].account_number;
cout << "Balance : ";
cin >> a[i].balance;
}
}
void print(CustomerRecord a[])
{
for (int i=0; i<5; i++)
{
cout << "Name : " << a[i].name << endl;
cout << "Account Number : " << a[i].account_number << endl;
cout << "Balance : " << a[i].balance <<endl;
}
}



but when i compile...
always appear " [Linker error] undefined reference to `read(CustomerRecord)' "


can u help me to solve my program??

For first try use this:

Code:

// xxxx.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include <iostream> #include <string> using namespace std; struct CustomerRecord    {    string name;    int account_number;    double balance;    }a[2]; void read_y(CustomerRecord*); void print_y(CustomerRecord*); int main(int argc, _TCHAR* argv[])    {       int c;       read_y(a);       print_y(a);       cin >> c;       return 0;    } void read_y(CustomerRecord* a)    {    for (int i=0; i<2; i++)       {       cout << "Name : ";       cin >> a[i].name;       cout << "Account Number : ";       cin >> a[i].account_number;       cout << "Balance : ";       cin >> a[i].balance;       }    } void print_y(CustomerRecord* a)    {    for (int i=0; i<2; i++)       {       cout << "Name : " << a[i].name << endl;       cout << "Account Number : " << a[i].account_number << endl;       cout << "Balance : " << a[i].balance <<endl;       }    }

At least this works...

 

For first try use this: Code: // xxxx.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include <iostream> #include <string> using namespace std; struct CustomerRecord    {    string name;    int account_number;    double balance;    }a[2]; void read_y(CustomerRecord*); void print_y(CustomerRecord*); int main(int argc, _TCHAR* argv[])    {       int c;       read_y(a);       print_y(a);       cin >> c;       return 0;    } void read_y(CustomerRecord* a)    {    for (int i=0; i<2; i++)       {       cout << "Name : ";       cin >> a[i].name;       cout << "Account Number : ";       cin >> a[i].account_number;       cout << "Balance : ";       cin >> a[i].balance;       }    } void print_y(CustomerRecord* a)    {    for (int i=0; i<2; i++)       {       cout << "Name : " << a[i].name << endl;       cout << "Account Number : " << a[i].account_number << endl;       cout << "Balance : " << a[i].balance <<endl;       }    } At least this works... what's with you and _TCHAR? that's not a type you should be using. and the error in the original program is that the 2 functions do not match signatures CustomerRecord is not the same as CustomerRecord[]

 

Hmmm, these things gets automatically generated by Visual Studio...? Why shouldnt that be used? If there some issue in using TCHAR please tell me.
I know, I altered the solution a bit....but for me it works, I compiled it and so I didnt check it any further. It should only be an very little alternative.

You can replace *a by a[]...wheres the problem (both dereferences the field a)? Also the name is not important (declaration and definition are in accordance).

ADD: Ah, one thing: I know that you dont have to use the paramters in main. But I think its helpful to have access to the parameters you start the *.exe with. I usually do not mention this... 

TCHAR mean CHAR for ANSI and WCHAR for Unicode.

 

Hmmm, these things gets automatically generated by Visual Studio...? Why shouldnt that be used? If there some issue in using TCHAR please tell me.

 

it's not a standard type, and even so you should be using TCHAR not _TCHAR