一段C语言代码在Xcode中编译出现Expected expreesion出错

#include <stdio.h>
#define IN 1
#define OUT 0
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);
    }
}