c 判断一个字符是否为空格

#include <stdio.h>
#include <wctype.h>
int main ()
{
  wchar_t c;
  int i=;
  wchar_t str[] = L"Example sentence to test iswblank\n";
  while (str[i])
  {
    c = str[i];
    if (iswblank(c)) c = L'\n';
    putwchar (c);
    i++;
  }
  return ;
}

输出

Ex
ample
sentence
to
test
iswblank