Thread: plss help

It's \t, not /t.

Do you know how to open a file? Read from one?

Maybe there's something in the tutorials about that kind of thing.

Here's one about "C file I/O": http://www.cprogramming.com/tutorial/cfileio.html

You mean, open an executable? And "read" it? Good luck . . . . You can't really do that. Use a regular file instead.

You can use fscanf() to read from a file the same way you would use scanf() to read from stdin (the keyboard).

The other functions you will need are fopen() and fclose(), which open and close files (see my link above).

Or fgetc() to read a single character.

Code:

int c;
while((c = fgetc(fp)) != EOF) {
    /* do something with character */
}

0408863864 4 F
2307192198 4 D
2107850859 1 D
0702831830 3 B
2808651656 1 C
2810851859 2 C
1610993997 4 F


i need the numbers, the number in the secound row, and the letter in three different varibles

Use fgets() with sscanf(), or fscanf().

Code:

fscanf(fp, "%*i %i %c", &thenumber, &thecharacter);

The %*i tells [f]scanf to read a number, but not to store it in anything.

Is that what you wanted?

yes it is more than clear from that code that you're new!! there's a few things wrong there that i can see just straight off - why are you using unistd.h - not using anything thats not in stdio...

ridget doent have a file extension, so thats never good.

you should always check to see that a file opened correctly, like this:

Code:

if ((fp=fopen("./riget.txt", "r")) == NULL)
{
       printf ("Error opening file");
       return 1;   /*the 1 is only to indicate an error - its good practice though to use a different number than 0 when there is an error*/
}

fscanf (fp, "%c", &output); - this will only read a single character change %c to %s, and you dont need the & since output is an array. change the %c to %s in your printf too.

note the use of return - you shouldnt use exit (0) to quit a program, always use return 0; thats the standard (0 indicates success).

also, fscanf will stop at the spaces, so you should probably use fgets instead.

i havent given you all the answers you need - research them yourself so you will learn for yourself, i've just pointed you in the direction of your problems.

one final note - in the words of Salem - the resident Grand Master: "Your indentation sucks". it should really be more even.