C Funtioncs - Count chars, words and lines

#include <stdio.h>

#define IN 1
#define OUT 0

int main(){
    int c, nl, nw, nc, state;
    state = OUT;
    nl = nw = nc = 0;
    while((c = getchar()) != EOF){
        ++nc; /*Count chars*/
        if(c == '\n') ++nl; /*Count lines*/
        if(c == ' ' || c == '\n' || c == '\t') state = OUT;
        else if(state == OUT){
             state = IN;
             ++nw; /*Count words*/
        }
     }
     printf("[Lines: %d]\n[Words: %d]\n[Chars: %d]\n", nl, nw, nc);
     return 0;
}