scanf question

[panfilero]

How can I make scanf skip a blank line....

I want it to fscanf some numbers

input file:

123
12235

343
643

I'm using a while loop
but the blank space is throwing everything off

how can i tell scanf to skip that empty space and read the number in the next line?

This is my code, although I dont know if it
makes sense cause I'm trying to do other stuff to:

while( strstr("class siz",temp_name) == NULL) {


    
    fgets(temp_name,30,fin);

    if(strlen(temp_name)>9){
        
           temp_name[9] = '\0' ; }
                        

fscanf(fin," %d",&ID);                               





printf("%d\n",ID);

Thank you

[Prelude]

>How can I make scanf skip a blank line....
You don't. scanf removes leading whitespace for the %d format modifier by default. I think what you're asking is how do you test to see if a string represents an empty line, since you use fgets to read the line and fscanf to parse it. The answer is that you only need to test the first character to see if it's a newline:

while ( fgets ( buffer, sizeof buffer, in ) != NULL ) {
  if ( buffer[0] != '\n' )
    fputs ( buffer, out );
}