Test 1st Character

[YOUNGCODGER]

Hi,

I am now coming back to 'C' after years away. My first task is to process an ASCII file of data. Only records that start with one of ten characters are required - the rest can be disregarded. So after doing an 'fgets' I need to check the first character. Testing one at a time against the ten seems messy - is there an elegant solution?

Regards,

YoungCodger

 

[victorv]

hi,
however you've to read all records and all chars in arecord;
in plain text files, records is a Human assuption, the APIs see the file as a stream of chars;


.....

{
char buffer[ENOUGH] ;

while( fgets( buffer, sizeof(buffer), stream ) != NULL )
{
if( !IsMychar(buffer[0]) )
continue ;

buffer[strlen(buffer)-1] = 0 ; // if you want del NL

BODY
}

//test here if exit from loop for EOF or other

}

//-----------------------------
BOOL IsMyChar( char c )
{
switch c
{
case 'A' :
case 'B' :
case 'C' :
.......
case 'D' : return 1;
}
return 0 ;
}


bye
vic

 

[ArkM]

const char* wanted = ".....";
...
while (fgets(line...)) {
    if (strchr(wanted,*line)) {
        /* that's it! */
    }
}