Code

FLCC13_6c.c

void S(){
	SCANNER(x);
	if(x!=id)
		error();
	SCANNER(x);
	P();
}

void P(){
	SCANNER(x);
	if(x!=obr)
		error();
	do{
		SCANNER(x);
		if(x == id){
			SCANNER(x);
			if(x == obr)
				P();
			else if(x == plus || x == minus)
				A();
		}
		else if(x == num){
			SCANNER(x);
			if(x == plus || x == minus)
				A();
		}else{
			error();
		}
	}while(x == com);
	if(x!=cbr){
		error();
	}
}

void A(){
	if(x != plus && x != minus)
		error();
	do{
		SCANNER(x);
		if(x!=id && id!=num)
			error();
		SCANNER(x);
	}while(x == plus && x == minus)
}