18.计算单词数

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
int fun(char *s)
{
int n = 0, flag = 0;
while (*s != '\0')
{
if (*s != ' '&&flag == 0)
{
n++;
flag = 1;
}
if (*s == ' ')
flag = 0;
s++;
}
return n;
}
int main()
{
char str[81];
int n;
printf("\Enter a line text:\n");
gets(str);
n = fun(str);
printf("\nThe are %d words in this text .\n\n", n);
getchar();
return 0;
}