C function to read a string to a heap array (I know that isn't the most optimized way to do this, but someone can make do with)

readString.c

// stream: if you want to read from the standard input, use stdin
// delim: a delimiter to the function stop reading, you can use '\n' to a standard linebreak

char *readString(FILE *stream, char delim){
	char *str = NULL;
	int counter = 0;
	char c;

	do {
		c = fgetc(stream);
		str = realloc(str, sizeof(char)*(counter+1));
		str[counter++] = c;
	} while (c != delim && c != EOF);

	str[--counter] = '\0';
	return str;
}