word-count without FSM

word-count without FSM.cpp

#include <stdio.h>
#include <map>
#include <utility>
#include <functional>

enum STATE
{
    IN,
    OUT,
};


int main()
{
    char c;
    int count = 0; // word count
    STATE state = OUT;
    while (scanf("%c", &c) != EOF && c != '\n') {
        if (c == ' ' || c == '\t') {
            switch (state) {
                case IN: {
                    state = OUT;
                }
                    break;
                case OUT: {
                    state = OUT;
                }
                    break;
            }
        }
        else {
            switch (state) {
                case IN: {
                    state = IN;
                }
                    break;
                case OUT: {
                    state = IN;
                    count++;
                }
                    break;
            }
        }
    }
    printf("word count: %d\n", count);
    return 0;
}