structure defined inside parms!

[mathmari]

Hi!Could you tell me why I get this message: warning: structure defined inside parms,when I run the program???

#include <stdio.h>

struct test
{
	char x;
	int y;
	float z;
	char lex[25];
};

void function(p)
     struct
     {
	     char c;
	     int i;
	     float d;
	     char c1;
	     char c2;
	     char c3;
	     char str1[12];
	     char str2[10];
     }p;
     {
	     printf("%c\n",p.c);
	     printf("%d\n",p.i);
	     printf("%f\n",p.d);
	     printf("%c\n",p.c1);
	     printf("%c\n",p.c2);
	     printf("%c\n",p.c3);
	     printf("%s\n",p.str1);
	     printf("%s\n",p.str2);
     }
     
     int main()
     {
	     struct test f;
	     f.x='A';
	     f.y=120;
	     f.z=3.14159;
	     strcpy(f.lex,"Hello");
	     function(f);
	     return 0;
     }