Thread: pointers searching through a file

hi guys

say you have a extern file with numbers from 0-20. so it contains

Code:

1\n2\n3\n4\n......\n20

the program's supposed to give all numbers greater than the number given on keyboard.

my file's called List however. so the sketch would look like this:

Code:

FILE *pfile;

pfile=fopen("C:\user\list.txt", "r+");


if(pfile != NULL){

.......  //my problem

fclose(pfile);

} 
 //it'd better follow with a else command in case the file doesn't work right

now somehow I should run the pfile pointer through the data in the "list" file so it could find the one that are greater than the number given via scanf....

and I can't figure how exactly...would running this work?

Code:

for(pfile=0;pfile<=20;pfile++){

I'd be grateful for any hint....

fcanf.

Check the return value for EOF.

Once you read a number, compare it with the number from keyboard. If it is ok, then print it. If not do nothing. Go the next number in the file ( a loop ).

For the else part, have a message informing the user that the file could not open and exit with return -1;