判断输入单词数

#define _CRT_SECURE_NO_WARNINGS 1

#include<stdio.h>

int main()

{

char c, arr[50];

int  i, num = 1, word = 1;

printf("please input words:\n");

gets(arr);

for (i = 0; (c = arr[i]) != '\0'; i++)

 if (c == ' ') num = 0;

 else if (num == 0)

 {

  word++;

  num = 1;

 }

printf("words=%d\n", word);

return 0;

}