mac clion c语言执行不到结果，怎么回事？

Question

mac上的clion ide中执行《c程序设计语言》中的习题，得不到直方图，输入了字符，啥都没输出，是哪块不对吗？

/*编写一个程序，打印输入中单词长度的直方图。水平方向的直方图比较容易绘制，垂直方向的直方图则要困难些。*/
    /*水平方向直方图*/
    int c, i, nc, state;

    int overflow;
    int len;
    int maxvalue;
    int wl[MAXWORD];

    state = OUT;
    nc = 0;
    overflow = 0;

    for (i = 0; i < MAXWORD; ++i) {
        wl[i] = 0;
    }

    while ((c = getchar()) != EOF) {
        if (c == ' ' || c == 't' || c == 'n') {
            state = OUT;
            if (nc > 0)
                if (nc < MAXWORD)
                    ++wl[nc];
                else
                    ++overflow;
            nc = 0;
        } else if (state == OUT) {
            state = IN;
            nc = 1;
        } else
            ++nc;
    }

    maxvalue = 0;
    for (i = 1; i < MAXWORD; ++i) {
        if (wl[i] > maxvalue) {
            maxvalue = wl[i];
        }
    }

    for (i = 1; i < MAXWORD; ++i) {
        printf("%5d - %5d", i, wl[i]);
        if (wl[i] > 0) {
            if ((len = wl[i] * MAXHIST / maxvalue) <= 0)
                len = 1;
        } else
            len = 0;
        while (len > 0) {
            putchar('*');
            --len;
        }
        putchar('n');
    }

    if (overflow > 0)
        printf("There are %d words >= %dn", overflow, MAXWORD);

Answer 1

犯了低级错误，ctrl+d发送EOF即可，抱歉！