#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

char *getline2(FILE *f){

	if (f = NULL){
		return NULL;
	}
	int len = 1;
	int now = 0;
	char *str = (char*)malloc(sizeof(char) * len);
	int c;
	for(c = getchar(); (c != EOF) && (c != '\n'); c = getchar()){
		str += c;
		now++;
		if (now == len){
			len *= 2;
			str = (char *) realloc (str, len);
		}
	}
	if (c == '\n'){
		now++;
		str += '\n';
		if (now == len){
			len *= 2;
			str = (char *) realloc (str, len);
		}
	}
	now++;
	str += '\0';
    fclose (f);
    return str;
}