根据单词出现次数输出水平直方图编译能通过但是并没有直方图输出

#include <stdio.h>

#define        MAXHIST        18
#define        MAXWORD        16
#define        IN        1
#define        OUT        0

main()
{
    int c, i, nc, state;
    int len;
    int maxvalue;
    int ovflow;
    int wl[MAXWORD];
    
    state = OUT;
    nc = 0;
    ovflow = 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)
                    ++nc;
                else
                    ++ovflow;
            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 (ovflow > 0)
        printf("There are %d words >= %d\n", ovflow, MAXWORD);}