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#include <stdio.h>
 
void Swap(int **dp1, int **dp2)
{
	int *temp = *dp1;
	*dp1 = *dp2;
	*dp2 = temp;
}
 
int main(void)
{
	int a = 10;
	int b = 20;
	int *c = &a;
	int *d = &b;
 
	printf("첫 결과: a: %d b: %d\n", a, b);
 
 
	pointer2(&c,%d);
	printf("최종결과 after a: %d b: %d\n", a ,b);
	return 0;
}
 

prog.c: In function ‘main’:
prog.c:20:2: warning: implicit declaration of function ‘pointer2’ [-Wimplicit-function-declaration]
  pointer2(&c,%d);
  ^~~~~~~~
prog.c:20:14: error: expected expression before ‘%’ token
  pointer2(&c,%d);
              ^
prog.c:15:7: warning: unused variable ‘d’ [-Wunused-variable]
  int *d = &b;
       ^

Standard output is empty