struct 

typedef struct
{
	int num;
	double grade;
} student;

typedef int (*AP5)[5];
AP5 ap1,ap2,ap3;

int (*)(int,int)func(int (*)(int,int),int(*)(int,int));//에러가남
->
int (* func(int (*)(int,int),int(*)(int,int)))(int,int);//이렇게 바꿈
->
typedef int (*FP)(int,int);
FP func(FP,FP);
->
typedef int FP(int,int);
FP * func(FP *,FP *);




////
int main()
{
	student s1,s2,temp;
	scanf(%d%lf",&s1.num,&s1.grade);
	scanf(%d%lf",&s1.num,&s1.grade);
}
temp=s1;
s1=s2;
s2=temp;//만으로 연산가능!!!
//그외에도 &연산도 가능
////
swap_struct(&s1,&s2);//이것으로 대체도 가능

void swap_struct (student *sp1,student *sp2)
{
	student temp;
	temp=*sp1;
	*sp1=*sp2;//포인터!!
	*sp2=temp;
}
////
swap_struct(&s1,&s2);//이것으로 대체도 가능

void swap_struct(student *sp1,student *sp2)
{
	//(*sp1).grade;
	sp1->grade;//위의 것과 동일!!!
	//좌측 구조체포인터변수!!
	//우측 구조체 맴버명!!
	//간접 맴버참조연산이라고 함//


	student temp;
	temp=*sp1;
	*sp1=*sp2;//포인터!!
	*sp2=temp;
}

/////
int main()
{
	student sary[5];
	//scanf(%d%lf",&sary[i].num,&sary[i]grade);//이것대신
	student_input(sary);//함수로대체
	return 0;
}
void student_input(student *sp)
{
	int i;
	for(i=0;i<5;i++)
	{
		scanf("%d", &sp[i].num);//
		scanf("%lf", &sp[i].grade);//
	}
}
//
int main()
{
	student sary[5];
	//scanf(%d%lf",&sary[i].num,&sary[i]grade);//이것대신
	student_input(sary);//함수로대체
	return 0;
}
void student_input(student *sp)
{
	int i;
	for(i=0;i<5;i++)
	{
		scanf("%d", &sp[i].num);//
		scanf("%lf", &sp[i].grade);//
	}
}