~cpp
#include <iostream>
#include <cstring>
using namespace std;
struct data{
char addressNumber[8];
char name[20];
char address[100];
data * next;
};
void showMenu();
data * enterName(data * firstData); // case 1
data * deleteName(data * firstData); // case 2
void showList(data * firstData); // case 3
unsigned int count=0;
int main()
{
data * firstData = new data;
firstData = NULL;
char menuNumber;
while(1)
{
showMenu();
cin >> menuNumber;
switch ( menuNumber )
{
case '1':
count++;
firstData = enterName(firstData);
break;
case '2':
if ( count > 0 )
{
count--;
firstData = deleteName(firstData);
}
else
{
cout << "Don't use this menu, yet.";
showMenu();
}
break;
case '3':
showList(firstData);
break;
case '4':
return 0;
break;
default:
system("cls");
showMenu();
break;
}
}
return 0;
}
void showMenu()
{
cout << "\tM E N U\n"
<< "1> Input data\n"
<< "2> Delete data\n"
<< "3> Show list\n"
<< "4> Quit\n"
<< "Selete number> ";
}
data * enterName(data * firstData)
{
system("cls");
data * temp = new data;
char addNum[8], nam[20], add[100];
cout << "Enter name :";
cin >> nam;
cout << "Enter address :";
cin.get();
cin.getline(add,99);
cout << "Enter address number :";
cin >> addNum;
cin.get();
if(firstData == NULL)
{
firstData = new data;
strcpy(firstData->name, nam);
strcpy(firstData->address, add);
strcpy(firstData->addressNumber, addNum);
firstData->next = NULL;
}
else
{
temp->next = firstData;
firstData = temp;
strcpy(firstData->name, nam);
strcpy(firstData->address, add);
strcpy(firstData->addressNumber, addNum);
}
return firstData;
}
data * deleteName(data * firstData)
{
system("cls");
char nam[20];
cout << "Enter name what you want : ";
cin >> nam;
data * temp = new data;
data * temp_co;
temp_co = NULL;
while(firstData != NULL)
{
if ( !(strcmp(firstData->name, nam) == 0) )
{
if (temp_co == NULL)
{
temp_co = new data;
strcpy(temp_co->name, firstData->name);
strcpy(temp_co->address, firstData->address);
strcpy(temp_co->addressNumber, firstData->addressNumber);
temp_co->next = NULL;
}
else
{
temp = new data;
temp->next = temp_co;
temp_co = temp;
strcpy(temp_co->name, firstData->name);
strcpy(temp_co->address, firstData->address);
strcpy(temp_co->addressNumber, firstData->addressNumber);
}
}
firstData = firstData->next;
}
firstData = temp_co;
return firstData;
}
void showList(data * firstData)
{
system("cls");
data * temp;
temp = firstData;
cout << "\t\t# L i s t #\n\n";
while(temp != NULL)
{
cout << "○" << temp->name << "\t" << temp->address << "\t" << temp->addressNumber << endl;
temp = temp->next;
}
cin.get();
cin.get();
}