Stuff

#include<stdio.h>


struct state {
	int state_number;
	struct state *transition1;
	char v1;
	struct state *transition2;
	char v2;
};
struct automata {
	struct state *start;
	struct state *final;
};


int createNewState (struct state **ptr) {
	if(tmp = malloc(sizeof(struct state))) {
		tmp = {0,(struct state*)NULL,'$',(struct state*)NULL,'$'};
		*ptr = &tmp;
		return TRUE;
	}
	else {
		return FALSE;
	}
}
			
struct automata findNfa ( struct automata ) {
	
	struct automata nfa = {NULL,NULL};
	while(ch != '$') {
		scanf("%c",&ch);
		if (ch >= 'a' && ch <= 'z') {
			struct state *temp1,*temp2;
			if(createNewState(&temp1) && createNewState(&temp2)) {
				temp1->state_number = ct++;
				temp2->state_number = ct++;
				temp1->transition1 = temp2;
				temp1->v1=ch;
				nfa.start = temp1;
				nfa.final = temp2;
			}
		if ( ch == '(') {
			nfa = findNFA (nfa);
		}
		else if ( ch == ')' ) {
			return nfa;
		}
		else if (ch == '*') {
			nfa = applyStar(nfa);
		}
		else if (ch == '|') {
			struct automata temp2 = {NULL,NULL};
			findNfa(temp2);
			nfa = applyOr(nfa,temp2);
		}
		else if (ch == '.') {
			struct automata temp3 = {NULL,NULL};
			findNfa(temp3);
			nfa = applyAnd(nfa,temp3);
		}
		else {
			printf("\nInvalid Input Characters\n");
			exit(1);
		}
	}
	return nfa;
}