Question

Hardware Inventory – Write a database to keep track of tools, their cost and number. Your program should initialize hardware.dat to 100 empty records, let the user input a record number, tool name, cost and number of that tool. Your program should let you delete and edit records in the database. The next run of the program must start with the data from the last session.

This is my program so far, when I run the program I keep getting "File Could not be Opened", which I have embeded in the program however I do not see why it is giving my this output immediatly

#include <stdio.h>
#include <math.h>
struct hardwareData
{
int recordNum;
char toolname[20];
int quantity;
double cost;
};
int enterChoice( void );
void textFile( FILE *readPtr );
void updateRecord( FILE *fPtr );
void newRecord( FILE *fPtr );
void deleteRecord( FILE *fPtr );
FILE *hfPtr;
int main()
{
FILE *cfPtr;
int choice;
if ((cfPtr = fopen( "hardware.dat", "rb+" )) == NULL )
{
printf( "File could not be opened.\n" );
}
else
{
while (( choice = enterChoice()) != 5 )
{
switch ( choice )
{
case 1:
textFile( cfPtr );
break;
case 2:
updateRecord( cfPtr );
break;
case 3:
newRecord ( cfPtr );
break;
case 4:
deleteRecord ( cfPtr );
break;
default:
printf( "Incorrect choice\n" );
break;
}
}
fclose( cfPtr );
}
return 0;
}
void textFile( FILE *readPtr )
{
FILE *writePtr;
struct hardwareData hardware = { 0, "", 0, 0.0 };
if ((writePtr = fopen( "hardware.txt", "w" )) == NULL )
{
printf( "File could not be opened.\n" );
}
else
{
rewind( readPtr );
fprintf( writePtr, "%-6s%-16s%-11s%-10s\n","Record #", "Tool name", "Quantity", "Cost" );
while ( !feof( readPtr ) )
{
fread( &hardware, sizeof( struct hardwareData ), 1, readPtr );
if ( hardware.recordNum != 0 )
{
fprintf(writePtr, "%-6d%-16s%-11d%10.2lf\n", hardware.recordNum, hardware.toolname, hardware.quantity, hardware.cost );
}
}
fclose( writePtr );
}
}
void updateRecord ( FILE *fPtr )
{
int record;
struct hardwareData hardware = { 0, "", 0, 0.0 };
printf( "Enter record to update (1-100): ");
scanf( "%d", &record );
fseek( fPtr, ( record - 1 ) * sizeof( struct hardwareData ), SEEK_SET );
fread( &record, sizeof( struct hardwareData ), 1, fPtr );
if ( hardware.recordNum == 0)
{
printf( "Record #%d has no information.\n", record );
}
else
{
printf( "Enter new tool name, quantity,cost \n?" );
scanf( "%s%d%lf", hardware.toolname, &hardware.quantity, &hardware.cost );
fseek( fPtr, ( record - 1 ) * sizeof( struct hardwareData ), SEEK_SET );
fwrite( &hardware, sizeof( struct hardwareData ), 1, fPtr );
}
}
void deleteRecord( FILE *fPtr )
{
struct hardwareData hardware;
struct hardwareData blankRecord = { 0, "", 0,0.0 };
int recordNum;
printf( "Enter record number to delete (1-100): " );
scanf( "%d", &recordNum );
fseek( fPtr, ( recordNum - 1 ) * sizeof( struct hardwareData ), SEEK_SET );
fread( &hardware, sizeof( struct hardwareData ), 1, fPtr );
if ( hardware.recordNum==0 )
{
printf ( "Record %d does not exist.\n", recordNum );
}
else
{
fseek( fPtr, ( recordNum - 1 ) * sizeof( struct hardwareData ), SEEK_SET );
fwrite( &blankRecord, sizeof( struct hardwareData ), 1, fPtr );
}
}
void newRecord( FILE *fPtr )
{
struct hardwareData hardware = { 0, "", 0, 0.0 };
int piece;
printf( "Enter record number to create (1-100) : " );
scanf( "%d", &piece);
fseek( fPtr, (piece - 1) * sizeof( struct hardwareData ), SEEK_SET );
fread( &hardware, sizeof( struct hardwareData ), 1, hfPtr );
if ( hardware.recordNum != 0 )
{
printf( "Record already exists.\n", hardware.recordNum );
}
else
{
printf( "Enter tool name, quantity, cost\n?" );
scanf("%s%d%.2lf", hardware.toolname, &hardware.quantity, &hardware.cost);
hardware.recordNum = piece;
fseek(fPtr, (hardware.recordNum-1) * sizeof( struct hardwareData), SEEK_SET);
fwrite( &hardware, sizeof( struct hardwareData), 1, hfPtr);
}
}
int enterChoice( void )
{
int menuChoice;
printf( "\nEnter your choice\n"
"1 - List of all tools\n"
"2 - Update an existing tool\n"
"3 - Add a new tool\n"
"4 - Delete a tool\n"
"5 - End program\n? " );
scanf( "%d", &menuChoice );
return menuChoice;
}