path: root/ch1/wc.c

#include<stdio.h>

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

/*
 * Count lines, words, and characters in input.
 */
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);
}