<mystring.h> header file

#include <iostream>
using namespace std;

class mystring {
private:
       int len;
       char *str;
public:
       mystring() : str(NULL), len(0) { }
       mystring(char *s) : str(new char[len+1]), len(length(s)) { copy(s); }
       mystring(const mystring &s)
              : str(new char[len+1]),
              len(length(s.str))
              {
              copy(s.str);
              }

       ~mystring()
              {
                     if (str != NULL) {
                     delete []str;
                            str = NULL;
                            len = 0;
                     }
              }

       char *get_string()
              {
                     return str;
              }

       void set_string(char *s)
              {
                     len = length(s);
                     if (str != NULL) delete []str;
                     str = new char[len+1];
                     copy(s);
              }

private:
       int length(char *s)
              {
                     int len = 0;

                     while (*s++ != '\0') len++;
                            return len;
              }

       void copy(char *s)
              {
                     for (int i = 0; i <= len; i++) str[i] = s[i];
              }
};

<main.cpp>

#include "mystring.h"

void print_safe(mystring &s) 

{

cout << "safe: " << s.get_string() << endl;

}  

void print_dangerous(mystring &s) 

{

cout << "dangerous: " << s.get_string() << endl;

}  

 void print()

{

mystring a("C++ Programming");

print_safe(a);

print_dangerous(a);

}

void foo()

{

mystring a("Sungshin University");

mystring b = a;

print_safe(a);

print_safe(b);

}

int main()

{

print();

foo();

system("pause");

return 0;

}

#include <iostream>
using namespace std;
struct myvector{
       int *p;
       int size;
       int next;
}
int get_size(myvector &m){
       //data개수 return
       return m.next;
}
int get_maxsize(myvector &m){
       //크기 return
       return m.size;
}
int get_value(myvector &m, int i){
       //a의 p의 i번방
       return m.p[i];
}
int set_value(myvector &m, int i, int v){
       //a의 i번 방을 v로 바꿔라
       return m.p[i] = v;
}
void push_back(myvector &m, int v){
       //제일 뒤에 5를 넣어라(next가 가리키고 있는 방에 넣기)
       m.p[m.next++] = v;
}
void clear(myvector &m){
       //다 지우고 다시 시작(next가 0)
       m.next = 0;
}
int main(){
       myvector a;
       get_size(a);
       get_maxsize(a);
       get_value(a, i);
       set_value(a, b, c);
       push_back(a, d);
       clear(a);
}

3주차 과제

#include <iostream>
#include <fstream>
using namespace std;

struct course {
        char subject[64];
        int studentNum;
        int score[256];
};

void process(ifstream &fin, course &a)
{
        int sum = 0;
        double ave = 0;
        fin >> a.subject;
        if (!fin.eof()) {
                cout << a.subject;
                fin >> a.studentNum;
                a.score = new int[a.studentNum];
                for (int j = 0; j < a.studentNum; j++) {
                        fin >> a.score[j];
                        sum += a.score[j];
                        ave = sum / (double)a.studentNum;
                }
                cout << "average : " << ave << endl;
        }
}

int main()
{
        course a[5] = {
                { "과목명1", 0, 0 },
                { "과목명2", 0, 0 },
                { "과목명3", 0, 0 },
                { "과목명4", 0, 0 },
                { "과목명5", 0, 0 },
        };

        ifstream fin("data.txt");

        if (fin.fail()) {
                cerr << "input file error"; return -1;
        }
        for (int i = 0; i < 5; i++)
                process(fin, a[i]);

        system("pause");
        return 0;
}

2주차 과제

#include <iostream>
#include <fstream>

using namespace std;

int main() {
        int sum = 0, num, sum1 = 0, number = 0;
        double average = 0;
        ofstream fout;
        ifstream fin;
        fin.open("data.txt");
        fout.open("output.txt");

        while (!fin.eof()) {
                sum1 = sum;

                fin >> num;

                for (int i = 0; i < num; i++) {
                fin >> number;
                        sum += number;
                }
                sum = sum - sum1;
                average = (double)sum / num;

                fout << "number of data : " << num << endl;
                fout << "sum : " << sum << endl;
                fout << "average : " << average << endl << endl;
        }

        fout.close();
        fin.close();

        return 0;
}

HTML

<body>
  <table border = "1">
    <tr>
    <td width = "50%">
      <ul>
        <li>list 1</li>
        <li>list2</li>
        <li>list3</li>
      </ul>
    </td>
    <td width = "50%">
      <ul>
        <li>list4</li>
        <li>list5</li>
        <li>list6</li>
      </ul>
    </td>
    </tr>
    <tr>
      <td>
        <p>Anything in table
        </p>
      </td>
      <td>
        <p> <img src = "cloud.jpg" alt = "cloud"/></p>
      </td>
    </tr>
</body>

=============================================================

<audio controls autoplay>
  <source src = "old_pop.ogg" type = "audio/ogg">
  <source src = "old_pop.wav" type = "audio/wav">
  <source src = "old_pop.mp3" type = "audio/mp3">
</audio>

=============================================================

<video controls src = "movie.mp4" >
</video>
<video src = "movie.ogg" autoplay controls>
</video>

<video width = "640" height = "480" controls>
  <source src = "trailer.ogv" type ='video/ogg'>
</video>
=============================================================

<body>
  <iframe src "" name ="iframe1"></iframe>
  <p><a href = "http://www.w3.org" target = "iframe1">www.web</a></p>

=============================================================

<body>
  <div style = "border : 3px solid red;">
    <h2>lion</h2>
    <p>lion lives in Africa and has strong legs and chin,
      <span style = "color : red;"> 긴 송곳니</span>
      를 지니고 있다.
    </p>
</body>

=============================================================

<body>
  <form action = "input.jsp" method = "post">
    <input type = "text" name = "Text" />
    <input type = "password" name = "password" />
    <input type = "radio" name = "radio" />
    <input type = "checkbox" name = "fruits" value = "Apple" checked >Apple
    <input type = "checkbox" name = "fruits" value = "grape">grape
   
    <input type = "range" name = "range" min="0" max = "10" step ="2"/>
    <input type = "file" name = "file" >
    <input type = "Reset" name = "Reset">
    <input type = "image" src = "submit.png" alt ="제출 버튼">
    <button type = "submit"><img src = "submit.png"></button>
    <input type = "hidden" name = "hidden">
    <input type = "submit" name = "submit" value = "제출">
 
  </form>
</body>

10.25 C++

#include <iostream>

using namespace std;

class myvector{
private :
int *p;
int size;
int next;
public :
myvector(){
p = NULL, size = next = 0;
}
myvector(int n){
size = n;
p = new int[n];
next = 0;
}
myvector(int n, int v){
size = n;
p = new int[n];
next = n;
for(int i = 0; i < n; i++)
p[n] = v;
}
~myvector(){
if (p != NULL) delete[] p;
}
int get_size(){
return next;
}
int get_maxsize(){
return size;
}
int get_value(int i){
return p[i];
if(i <0 || i >= next){
cout << "index out of range" << endl;
return -1;
}
}
void set_value(int i , int v){
if(i < 0 || i >= next){
cout << "index out of range" << endl;
}
else p[i] = v;
}
void push_back(int v){
if (size == next){
if(p == NULL){
p = new int[10];
size = 10;
}
else
{
int *q = new int[size *2];
for(int i =0;i<size;i++){
q[i]=p[i];
}
delete[] p;
p = q;
size = size*2;
}
}
p[next++] = v;
}
void clear(){
delete[] p;
size = next = 0;
}
};

void read_data(myvector &m){
        int value;
        m.clear();
        while(true){
                cin >> value;
                if(value < 0) break;
                m.push_back(value);
        }
}
void process(myvector &m){
        int sum = 0;

        for(int i = 0;i<m.get_size();i++){
                sum += m.get_value(i);
        }
        cout << (double)sum / m.get_size() << endl;
}

int main(){
myvector a, b(20), c(16,100);

cout << a.get_maxsize() << "," << a.get_size() << endl;
cout << b.get_maxsize() << "," << b.get_size() << endl;
cout << c.get_maxsize() << "," << c.get_size() << endl;

read_data(a); process(a);
read_data(a); process(a);

return 0;
}

최종 완성본

#include <iostream>

using namespace std;

class myvector{
private :
int *p;
int size;
int next;
public :
myvector(){
p = NULL, size = next = 0;
}
myvector(int n){
size = n;
p = new int[n];
next = 0;
}
myvector(int n, int v){
size = n;
p = new int[n];
next = n;
for(int i = 0; i < n; i++)
p[n] = v;
}
~myvector(){
if (p != NULL) delete[] p;
}
int get_size(){
return next;
}
int get_maxsize(){
return size;
}
int get_value(int i){
return p[i];
if(i <0 || i >= next){
cout << "index out of range" << endl;
return -1;
}
}
void set_value(int i , int v){
if(i < 0 || i >= next){
cout << "index out of range" << endl;
}
else p[i] = v;
}
void push_back(int v){
if (size == next){
if(p == NULL){
p = new int[10];
size = 10;
}
else
{
int *q = new int[size *2];
for(int i =0;i<size;i++){
q[i]=p[i];
}
delete[] p;
p = q;
size = size*2;
}
}
p[next++] = v;
}
void clear(){
delete[] p;
size = next = 0;
}
};

void read_data(myvector &m){
int value;
m.clear();
while(true){
cin >> value;
if(value < 0) break;
m.push_back(value);
}
}
void process(myvector &m){
int sum = 0;

for(int i = 0;i<m.get_size();i++){
sum += m.get_value(i);
}
cout << (double)sum / m.get_size() << endl;
}

int main(){
myvector a, b(20), c(16,100);

cout << a.get_maxsize() << "," << a.get_size() << endl;
cout << b.get_maxsize() << "," << b.get_size() << endl;
cout << c.get_maxsize() << "," << c.get_size() << endl;

read_data(a); process(a);
read_data(a); process(a);

return 0;
}