Member Avatar for dapcigar

Am having an assignment on modular programing.
the program ( VCD system) must
(1) Initialize database,
(2) Add a record for VCD
(3) delete record for a VCD
(4) Print out all VCD
(5) save to text file
(6) Load from text file.

have actually worked on it but i just can't get pass the errors.. it's really killing me..
can i get someone to check my program?.. problem solving is one hell of a headache for me..

am attaching the assignment to this message...........

please guys, come to my rescue...
thanks in advance

VCD_system.zip (1835.94 KB)
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  • Latest Post Latest Post by Ancient Dragon

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A compact troubleshooting addendum for the VCD assignment that builds on points raised by and the OP . The following checklist and tiny examples are intended to make the build/link/file-I/O problems visible and fixable quickly, without changing the program design.

Keep the build simple and consistent. All .cpp/.h files must be part of a single project/target (only one main). If the project uses precompiled headers (VC++6 common), each .cpp should include the precompiled header first. Declarations in headers must match definitions exactly (return type, name, parameter types, const qualifiers). Use include guards. Example header/definition pattern:

// prompt.h
#ifndef PROMPT_H
#define PROMPT_H

void ShowMenu();

#endif

// prompt.cpp
#include "prompt.h"
void ShowMenu() { /* implementation */ }

Make file I/O robust and symmetric. Always include <fstream> and <string>, pick one filename constant used for both save and load, and check that stream objects opened successfully before reading or writing:

#include <fstream>

const char* DATA_FILE = "vcd_db.txt";
std::ofstream out(DATA_FILE);
if (!out) { /* report error / abort save */ }

Use a simple, unambiguous record format (one record per line, a safe delimiter like '|'), parse with getline + stringstream, and escape delimiters if fields can contain them.

A practical debugging workflow: (1) fix compile errors first, (2) read linker errors to find missing symbols or signature mismatches, (3) confirm every .cpp with a needed definition is added to the project, (4) add small unit tests or a minimal main that exercises add/delete/save/load, and (5) rebuild frequently. Typical causes remaining after this are typos in identifiers, mismatched prototypes/definitions, or a file omitted from the project.

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Member Avatar for Ancient Dragon

prompt.h: missing the return type of all functions.
prompt.cpp: ditto (same problem)

your zip file contains 4 different projects. That's not what you want. You need to put all those files into just one project so that they can all be linked together.

commented: Kudos for taking the time to look. +17
Member Avatar for dapcigar

prompt.h: missing the return type of all functions.
prompt.cpp: ditto (same problem)

your zip file contains 4 different projects. That's not what you want. You need to put all those files into just one project so that they can all be linked together.

Thanks....
i was using Vc++ 6 to write the program initially.
have added it to a project now..
thanks in advance

vcd1.zip (428.02 KB)
Member Avatar for Ancient Dragon

That zip file doesn't include the *.cpp and *.h files so I just copied them from your last *.zip file.

Continuing from where I left off
vcdrec.cpp: you forgot to include <fstream> which is where ifstream is declared.

Then you misspell the name of the ifstream object every time you used it.

You have confused Load_Record_From_File() and Load_Save_To_File(). Switch the code in those two functions around. And I think the filename used in both those functions should be the same. You can't write the data to one file and expect to read from a different file.

After correcting all the above your program is left with several functions you have not yet coded. The link error messages will tell you which functions are missing.

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