dummy

#include <stdio.h>#include <stdlib.h>static FILE * fptr;char * readline(char * fname, int lnr){	char * buff;	char * line = NULL;	int i, h = 1, g = 0;	fptr =fopen(fname, "r");	line = malloc(sizeof(char)*48);	if (fptr ==NULL)	{		return NULL;	}	fread(buff, 19200, 4, fptr);	for (i = 0; i < 480; i++)	{		printf("wir sind jetzt bei zeichen %i, dies ist ein %c \n", i+1, buff[i]);		if (* buff == '\n')		{			h++;			printf("zeilenwechsel. \n");		}		else		{			if (lnr == h)			{				line = buff;				printf("%c \n", *line);				g++;			}			if (lnr == h - 1 && g != 0)			{				*line = '\0';				printf("string abgeschlossen. \n");				printf("letztes zeichen der Zeile: %c \n", *(line -1) );				return line;			}			if (lnr == h -1 && g == 0)			{				return NULL;			}		}		buff++;			}	return line;}int writeline(char * fname, int lnr, char * str){	fptr = fopen(fname, "r+");	if (fptr ==NULL)	{		return 1;	}	fprintf(fptr, str);	fclose(fptr);	return 0;}int deleteline(char * fname, int lnr){	return 0;}int main(void) {	char * teststring;	teststring = malloc(sizeof(char)*48);		teststring = readline("test.db", 1);//	if (teststring == NULL)//		printf("null pointer! \n");//	else //		printf("was anderes");	return 0;}