[C++]포인터배열의 동적메모리할당

[[연습문제 1]]

#include <iostream>
#include <stdlib.h>
#include <iomanip>

using std::cin;
using std::cout;
using std::endl;
using std::setw;

struct Student
{
 char name[20];
 int kor, eng, mat, sum;
};

void input(Student *p, int in);
void outpt(Student *p, int out);

int main()
{
 int in;
 cout << "학생수 입력 : ";
 cin >> in;

 Student *pts;
 pts = new Student[in];
 cout << "실행중에 메모리 할당(동적 할당) -> new 연산자 이용\n";

 input(pts, in);
 outpt(pts, in);
 delete [] pts;
 return 0;
}

void input(Student *p, int in)
{
 for(int i=0; i<in; i++)
 {
  system("cls");
  cout << "\n[" << i+1 << "번째 입력]\n";
  cout << "\n 이    름 : ";
  cin >> p[i].name;
  cout << "\n 국    어 : ";
  cin >> p[i].kor;
  cout << "\n 영    어 : ";
  cin >> p[i].eng;
  cout << "\n 수    학 : ";
  cin >> p[i].mat;
  p[i].sum = p[i].kor + p[i].mat + p[i].eng;
 }
}
void outpt(Student *p, int out)
{
 system("cls");
 cout << "\n\n\t\t***** 점 수 출 력 *****\n\n";
 cout << setw(6) << "번호" << setw(15) << "이름" << setw(7) << "국어"
  << setw(7) << "영어" << setw(7) << "수학" << setw(7) << "총점" << endl;
 for(int i=0; i<out; i++)
 {
  cout << setw(6) << i+1 << setw(15) << (p+i)->name << setw(7) << (p+i)->kor
   << setw(7) << (p+i)->eng << setw(7) << (p+i)->mat << setw(7) << (p+i)->sum << endl;
 }
}

[[연습문제 2]]
#include <iostream>
using std::cin; using std::cout; using std::endl;

#define MEMO_CNT 5
#define MEMO_LENGTH 1024

int main()
{
 char *p[MEMO_CNT];
 char buf[MEMO_LENGTH];

 for(int i=0; i<MEMO_CNT; i++)
 {
  cout << "Input MEMO : ";
  fflush(stdin);
  cin.getline(buf , MEMO_LENGTH);
  p[i] = new char[strlen(buf)+1];
  strcpy(p[i], buf);
 }

 cout << "\n\n\t\t***** Output MEMO *****\n";
 for(i=0; i<MEMO_CNT; i++)
 {
  cout << p[i] << endl;
 }

 for(i=0; i<MEMO_CNT; i++)
 {
  delete [] p[i];
  cout << "동적 메모리 해제\n";
 }

 return 0;
}