字符串中单词的数目

[c]代码库

#include<string.h>
int main(){
   char str[20];
   int i, num = 0, word = 0;
   gets(str);
   for(i = 0; str[i] != '\0'; i++){
    //if(!((str[i]>='A'&&str[i]<='Z') || (str[i]>='a'&&str[i]<='z')))//不是单词的话
    if(str[i] == ' ')
        word = 0;
    else if(word == 0){       //是单词，而且Word == 0  
        word = 1;
        num++;
    }
   }
   printf("the number is:%d", num);
   return 0;
}