Thread: Reading random line from a text file

Hello,
I really need help with this program. It's a wheel of fortune program. I think I'm really close to finishing it but I really need help adapting it to read a text file of any length and to make sure that when a random line is chosen from the text file it is not chosen again. Thanks again in advance.

Code:

int initialize_array(char phrase[], char puzzle[], char clue[]){
	FILE* phraseFile; /*input file*/
	char temp[100]; /*temporary array*/
	int line; /*line from which word and clue are chosen*/
	size_t i=0; /*counter for loop*/
	int len; /*length of line from file*/


	line=rand()%43+1; /*randomization of line*/
	
	phraseFile = fopen("clues.txt", "r"); /*opens file*/
	            
	if (!phraseFile) {
		fprintf(stderr, "Oops - file not opened !\n"); /*if there is error in opening file program is exited*/
		exit(1);
		}

		while(line--){
			fgets(temp, 100, phraseFile); /*gets line and stores in temp*/
		}
		
	len=strlen(temp);
	if(temp[len-1]=='\n')
		temp[len-1]=0; /*places the null terminating character after word*/
		
		/*separates clues from word*/
		strcpy(clue,strtok(temp, "%"));
		/*
		strcpy(phrase,strtok(NULL,"%"));*/
	char tmp[WORD_LENGTH];
	strcpy(tmp,strtok(NULL,"%"));
	strcpy(phrase, tmp + 1);
	strcpy(puzzle,phrase);


		/*strcpy(puzzle,phrase);*/
	
		while(i<strlen(puzzle)){
			if(isalpha(puzzle[i])){
				puzzle[i] = '*'; /*hides word*/
				}
				++i;
			}
	fclose(phraseFile);	/*closes file*/	
	return i;
}