提取字符串里的单词

#include<stdio.h>
#include<ctype.h>
#include<memory.h>

int main()
{
        char *str="ok112009this9964541look" ;
                char *fun=str;
        int state;
        for(;(*fun)!='\0';fun++)
        {
                while(isalpha(*fun)&&(*fun)!='\0')
                {
                putchar(*fun);
                fun++;
                state=1;
                }
                if(state)
                printf(" ");
                state=0;
        }
                

        return 0;
}