PA4

#include <stdio.h>

int types[255]; // 0 = Alphabet, 1 = NUMBER, 2 = OPERATOR, 3 = OTHER
char words[255][255];

int classtype(char *str) {
	int type = 0 , temp = 0;
	if (str != NULL) {
		if (str[0] >= 'A' && str[0] <= 'Z') {
			type = 0;
		}
		else if (str[0] >= 'a' && str[0] <= 'z') {
			type = 0;
		}
		else if (str[0] >= '0' && str[0] <= '9') {
			type = 1;
		}
		else if (str[0] == '*' || str[0] == '^' || str[0] == '/') {
			type = 2;
		}
		else if (str[0] == '+' || str[0] == '-') {
			type = 4;
		}
		else if (str[0] == '.')
		{
			if (temp == 0) {
				type = 1;
			}
			else {
				type = 3;
			}
			temp++;
		}
		else {
			type = 3;
		}
		for (int i = 1; str[i]; i++) {
			if (str[i] >= 'A' && str[i] <= 'Z') {
				type = (type != 0) ? 3 : 0;
			}
			else if (str[i] >= 'a' && str[i] <= 'z') {
				type = (type != 0) ? 3 : 0;
			}
			else if (str[i] >= '0' && str[i] <= '9') {
				if (type == 4) {
					type = 1;
				}
				else {
					type = (type != 1) ? 3 : 1;
				}
			}
			else if (str[i] == '*' || str[i] == '-' || str[i] == '^' || str[i] == '/' || str[i] == '+') {
				if (type == 4) {
					type = 2;
				}
				else {
					type = (type != 2) ? 3 : 2;
				}
			}
			else if (str[i] == '.')
			{
				if (temp == 0) {
					type = (type != 1) ? 3 : 1;
				}
				else {
					type = 3;
				}
				temp++;
			}
			else {
				type = 3;
			}
		}
	}
	return type;
}
void parse() {
	char buff[100]; 
	char delimiter[] = " \t\n";
	int type = 0, temp = 1, std = 1;
	while (fgets(buff, 100, stdin)) {
		char* ps = 0;
		ps = strtok(buff, delimiter);
		types[temp] = classtype(ps);
		for (int i = 0; (ps != NULL) ? i < ps[i] : 0; i++) {
			words[temp][i] = ps[i];
		}
		temp++;
		while (ps) {
			ps = strtok(NULL, delimiter);
			types[temp] = classtype(ps);
			for (int i = 0; (ps != NULL) ? ps[i] : 0; i++) {
				words[temp][i] = ps[i];
			}
			temp++;
		}
		temp--;
		fflush(stdin);
	}
		for (int i = 1; i < temp; i++) {
			printf("[%d] ", i);
			printf("%s", words[i]);
			if (types[i] == 0) {
				printf(" (Alphabets)\n");
			}
			if (types[i] == 1) {
				printf(" (Numbers)\n");
			}
			if (types[i] == 2) {
				printf(" (Operators)\n");
			}
			if (types[i] == 3) {
				printf(" (Others)\n");
			}
		}
	
}

void main() {
	parse();
}