MAKE file for @%^?

hello.c
#include
//#include
#include "func.h"
#include "my.h"

int main(void){
char * say ="hello, world\n";
printf("%s \n" ,say);
func();

//printf("%f\n",log(1000));

return 0;

}

func.c
#include

int func (void){
printf("come from func");
return 0;
}

func.h
#include
int func (void);


my.h
#define NUMBER 1024


Makefile

CC=gcc
all: hello

func.o: func.c func.h
$(CC) $(OPT) -c func.c
echo "1=$@ 2=$< 3="$?" 4="$^" 1="$@" 2="$<" 3="$?" 4="$^" 1="$@" 2="$<" 3="$?" 4="$^" 1="$@" 2="$<" 3="$?" 4="$^">