求助大佬单词计数程序运行结果与事实不符

#include <stdio.h>
#include <string.h>

typedef enum {
    STS_INIT,
    STS_WORD_START,

 } state_t;

main()
{
    int c, nl, nw, nc;
    state_t state;
   
    state = STS_INIT;
    nl = nw = nc = 0;

    while ((c = getchar())!= EOF) {
        ++nc;
        switch (c) {
        case '\r':
        case '\n':
            ++nl;
        case '\t':
        case ' ':
            if (STS_WORD_START == state) {
                state = STS_INIT;
                ++nw;
            }
            break;
        default:
            if (STS_INIT == state) {
                state = STS_WORD_START;
            }
            break;
        }
    }

    printf("%d %d %d\n", nl , nw, nc);
}