C和指针之判断参数在关键字字符串列表中是否匹配

   

    

     

      

     
     

      

       #include <stdio.h>
      
     
    

     

      

     
     

      

       #include <stdlib.h>
      
     
    

     

      

     
     

      

       #include <string.h>
      
     
    

     

      

     
     

      
 
      
     
    

     

      

     
     

      

       /**
      
     
    

     

      

     
     

      

        *判断参数是否与一个关键字列表任何单词匹配
      
     
    

     

      

     
     

      

        *并返回匹配的索引值，如果没有找到返回-1
      
     
    

     

      

     
     

      

        **/
      
     
    

     

      

     
     

      
 
      
     
    

     

      

     
     

      

       int lookup_keyword(const char *const desired,
      
     
    

     

      

     
     

      

       const char *keyword[], int const size)
      
     
    

     

      

     
     

      

       {
      
     
    

     

      

     
     

      

        const char **p;
      
     
    

     

      

     
     

      

        for (p = keyword; p < keyword + size; p++)
      
     
    

     

      

     
     

      

        {
      
     
    

     

      

     
     

      

        if (strcmp(desired, *p) == 0)
      
     
    

     

      

     
     

      

        {
      
     
    

     

      

     
     

      

        return p - keyword;
      
     
    

     

      

     
     

      

        }
      
     
    

     

      

     
     

      

        }
      
     
    

     

      

     
     

      

        return -1;
      
     
    

     

      

     
     

      

       }
      
     
    

     

      

     
     

      

       
      
     
    

     

      

     
     

      

       int main()
      
     
    

     

      

     
     

      

       {
      
     
    

     

      

     
     

      

        const char *keyword[] = {"chen", "gong", "yu", "cai"};
      
     
    

     

      

     
     

      

        const char *const desired = "yu";
      
     
    

     

      

     
     

      

        int size = sizeof(keyword) / sizeof(keyword[0]);
      
     
    

     

      

     
     

      

        printf("size is %d\n", size);
      
     
    

     

      

     
     

      

        int result = lookup_keyword(des