Thread: Segmenation Fault

Hi, I'm trying to run a program that contains the following code. When running it, the program crashes; however, when debugging it, I get segmentation Fault error. Can someone please help. thanks.

Code:

void fileheader(char fn[],int *a )

{

        int c;
        FILE *fp;
        fp=fopen(fn,"r");
        while((c=getc(fp)) != '\n');
                while ((c=getc(fp)) == '#')
                  {while ((c=getc(fp)) != '\n');}
        ungetc(c,fp);
        fscanf(fp,"%d%d%d",&a[0],&a[1],&a[2]);
        fclose(fp);
}

Code:

void fileheader(char fn[],int *a )

{

        int c;
        FILE *fp;
        fp=fopen(fn,"r");// is fn null-terminated?
        while((c=getc(fp)) != '\n'); //moves filepointer pass leading newlines
        while ((c=getc(fp)) == '#')//while 1st char in row is '#' ---indentation was misleading
        {
		while ((c=getc(fp)) != '\n');// move to next row
	} 
        ungetc(c,fp);//unget last read??, why?? .. probably points at newline now
        fscanf(fp,"%d%d%d",&a[0],&a[1],&a[2]);// is "a" defined as an array of at least 3 int?  Are you reading past end of file?
        fclose(fp);
}