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#include <stdio.h>
 
void main(){
	int value=100;
	int *pointer=&value;
	int &refer=value; // 에러
 
	*pointer=20;
 
	printf("value=%d\n", value);
	printf("*pointer=%d\n", *pointer);
	printf("pointer=%#010x\n", pointer);
	printf("refer=%d\n", refer); // 에러
 
 
	printf("\n");
 
	refer=30; // 에러
 
	printf("value=%d\n", value);
	printf("*pointer=%d\n", *pointer);
	printf("pointer=%#010x\n", pointer);
	printf("refer=%d\n", refer); // 에러
}
 

prog.c:3:6: warning: return type of ‘main’ is not ‘int’ [-Wmain]
 void main(){
      ^~~~
prog.c: In function ‘main’:
prog.c:6:6: error: expected identifier or ‘(’ before ‘&’ token
  int &refer=value; // 에러
      ^
prog.c:12:23: warning: format ‘%x’ expects argument of type ‘unsigned int’, but argument 2 has type ‘int *’ [-Wformat=]
  printf("pointer=%#010x\n", pointer);
                       ^
prog.c:13:23: error: ‘refer’ undeclared (first use in this function)
  printf("refer=%d\n", refer); // 에러
                       ^~~~~
prog.c:13:23: note: each undeclared identifier is reported only once for each function it appears in
prog.c:22:23: warning: format ‘%x’ expects argument of type ‘unsigned int’, but argument 2 has type ‘int *’ [-Wformat=]
  printf("pointer=%#010x\n", pointer);
                       ^

Standard output is empty