wc_getchar.c

#include <stdio.h>

#define IN 1 /* inside a word */
#define OUT 0 /* outside a word */

/* count lines, words, and characters in input */
int main(){
    int c, nl, nw, nc, state;
    state = OUT;
    nl = nw = nc = 0;

    while ((c = getchar()) != EOF) {
        ++nc;
        if (c == '\n')
            ++nl;

        if (c == ' ' || c == '\n' || c = '\t')
            state = OUT;
        else if (state == OUT) {
            state = IN;
            ++nw;
    }
}
printf("%d %d %d\n", nl, nw, nc); }