int main(int argc, const char * argv[])
{
SetHomeDirectory(); // set working dir to ~
chdir( "./Desktop" ); // set working dir to ~/Desktop
int number;
char dinoName[ kDinoRecordSize+1 ];
// GetNumber() returns a number typed by the user that indicates the
// "command" to be performed.
// 1..n: print and optionally update a record
// -1: append a new record
// 0: quit
while ( (number = GetNumber()) != 0 ) {
if ( number>0 ) {
// Read the nth record and print the name
ReadDinoName( number, dinoName );
printf( "Dino #%d: %s\n", number, dinoName );
} else {
// number == -1: set number to next record #
number = GetNumberOfDinos() + 1;
}
if ( GetNewDinoName( dinoName ) )
WriteDinoName( number, dinoName );
}
printf( "Goodbye..." );
return 0;
}
int GetNumber(void) {
int number, numDinos;
numDinos = GetNumberOfDinos();
do {
printf("Enter number from 1 to %d (0 to exit): ", numDinos);
scanf("%d", &number);
Flush();
} while ((number < 0) || (number > numDinos));
return number;
}
/**************************
GetNumber()
returns a number between 0 and the number of
dinosaur records in the file, or -1
if the user typed 'a'
Calls GetNumberOfDino() to obtain the # of
records in the file.
Prompts the user to enter a number between 1 an #.
Reads a line and converts that to an integer.
Loops until number is between 0 and #, inclusive,
or the line starts with the letter 'a'.
*/
int GetNumber( void )
{
int number, numDinos;
numDinos = GetNumberOfDinos();
do {
printf( "Enter number from 1 to %d (0 to exit, a to add): ",
numDinos );
// Read a line from the keyboard and convert it to a number
char lineBuffer[ kMaxLineLength ];
fgets( lineBuffer, sizeof(lineBuffer), stdin );
number = atoi( TrimLine(lineBuffer) );
// If the line doesn't contain an integer, see if it starts
// with the letter 'a'. If so, return -1 to the caller.
if ( number==0 && *TrimLine(lineBuffer)=='a' )
return -1;
} while ( (number < 0) || (number > numDinos) );
return number;
}
