9.Data Structure & Pointer
09 Sep 2019 | C++
Example 1
#include <iostream>
using namespace std;
struct book
{
string author;
string title;
int publicationYear;
};
void setBook(book&);
int main()
{
book book1, book2, book3;
setBook(book1);
setBook(book2);
setBook(book3);
return 0;
}
void setBook(book &bookToSet)
{
cout << "Who is the author of the book: ";
cin >> bookToSet.author; // kind of def in python
cout << "What is the title of the book: ";
cin >> bookToSet.title;
cout << "In what year was the book published: ";
cin >> bookToSet.publicationYear;
}
Example 2
#include <iostream>
using namespace std;
struct book
{
string author;
string title;
int publicationYear;
};
void setBook(book&);
void showBook(book);
int main()
{
book book1, book2, book3;
setBook(book1);
setBook(book2);
setBook(book3);
showBook(book1);
showBook(book2);
showBook(book3);
return 0;
}
void setBook(book &bookToSet)
{
cout << "Who is the author of the book: ";
getline(cin, bookToSet.author);
cout << "What is the title of the book: ";
getline(cin, bookToSet.title);
cout << "In what year was the book published: ";
cin >> bookToSet.publicationYear;
cin.ignore();
}
void showBook(book bookToShow)
{
cout << endl << bookToShow.author << " " << bookToShow.title << " " << bookToShow.publicationYear << endl;
}
Example 3
#include <iostream>
using namespace std;
int main ()
{
int arraySize;
cout << "Input the size of the dynamic array you want to create: ";
cin >> arraySize;
int *dynamicArray = new int[arraySize];
for (int i = 0; i < arraySize; i++)
{
cout << "Input " << i+1 << " number: ";
cin >> *(dynamicArray+i);
}
for (int i = 0; i < arraySize; i++)
{
cout << "Number " << i+1 << ": " << *(dynamicArray+i) << endl;
}
delete []dynamicArray;
}
Example 4
#include <iostream>
using namespace std;
int main ()
{
int a = 5;
int *p = &a;
int **pp = &p;
cout << "Value of the variable a is equal to: " << a << endl;
cout << "The address of the variable a is equal to: " << &a << endl;
cout << "The value stored in the pointer p is equal to: " << p << endl;
cout << "To get the value of the variable a using pointer p one has to point to the address in the pointer p, *p = " << *p << endl << endl;
cout << "Pointer p has its own address which is: " << &p << endl;
cout << "The value stored in the pointer pp is equal to: " << pp << endl;
cout << "To get the value of the pointer p using pointer pp one has to point to the address in the pointer pp, *pp = " << *pp << endl;
cout << "To get the value of he variable a using pointer pp one has to point to the address in the pointer pp and p, **pp = " << **pp << endl;
return 0;
}
Example 5
#include <iostream>
using namespace std;
int main ()
{
int charactersNumber;
cout << "How many characters would you like to input: ";
cin >> charactersNumber;
char *characters = new char[charactersNumber];
for (int i = 0; i < charactersNumber; i++)
{
cout << i+1 << " character: ";
cin >> characters[i];
}
cout << "The inputted string of characters was: ";
for (int i = 0; i < charactersNumber; i++)
{
cout << *(characters+i);
}
delete [] characters;
return 0;
}
Example 6
#include <iostream>
using namespace std;
int main ()
{
int arr[5];
int *pArr = arr;
for (int i = 0; i < 5; i++)
{
cout << "Input " << i+1 << " number: ";
cin >> *(pArr++);
}
for (int i = 0; i < 5; i++)
{
cout << "Number " << i+1 << ": " << arr[i] << endl;
}
return 0;
}
Example 1
#include <iostream>
using namespace std;
struct book
{
string author;
string title;
int publicationYear;
};
void setBook(book&);
int main()
{
book book1, book2, book3;
setBook(book1);
setBook(book2);
setBook(book3);
return 0;
}
void setBook(book &bookToSet)
{
cout << "Who is the author of the book: ";
cin >> bookToSet.author; // kind of def in python
cout << "What is the title of the book: ";
cin >> bookToSet.title;
cout << "In what year was the book published: ";
cin >> bookToSet.publicationYear;
}
Example 2
#include <iostream>
using namespace std;
struct book
{
string author;
string title;
int publicationYear;
};
void setBook(book&);
void showBook(book);
int main()
{
book book1, book2, book3;
setBook(book1);
setBook(book2);
setBook(book3);
showBook(book1);
showBook(book2);
showBook(book3);
return 0;
}
void setBook(book &bookToSet)
{
cout << "Who is the author of the book: ";
getline(cin, bookToSet.author);
cout << "What is the title of the book: ";
getline(cin, bookToSet.title);
cout << "In what year was the book published: ";
cin >> bookToSet.publicationYear;
cin.ignore();
}
void showBook(book bookToShow)
{
cout << endl << bookToShow.author << " " << bookToShow.title << " " << bookToShow.publicationYear << endl;
}
Example 3
#include <iostream>
using namespace std;
int main ()
{
int arraySize;
cout << "Input the size of the dynamic array you want to create: ";
cin >> arraySize;
int *dynamicArray = new int[arraySize];
for (int i = 0; i < arraySize; i++)
{
cout << "Input " << i+1 << " number: ";
cin >> *(dynamicArray+i);
}
for (int i = 0; i < arraySize; i++)
{
cout << "Number " << i+1 << ": " << *(dynamicArray+i) << endl;
}
delete []dynamicArray;
}
Example 4
#include <iostream>
using namespace std;
int main ()
{
int a = 5;
int *p = &a;
int **pp = &p;
cout << "Value of the variable a is equal to: " << a << endl;
cout << "The address of the variable a is equal to: " << &a << endl;
cout << "The value stored in the pointer p is equal to: " << p << endl;
cout << "To get the value of the variable a using pointer p one has to point to the address in the pointer p, *p = " << *p << endl << endl;
cout << "Pointer p has its own address which is: " << &p << endl;
cout << "The value stored in the pointer pp is equal to: " << pp << endl;
cout << "To get the value of the pointer p using pointer pp one has to point to the address in the pointer pp, *pp = " << *pp << endl;
cout << "To get the value of he variable a using pointer pp one has to point to the address in the pointer pp and p, **pp = " << **pp << endl;
return 0;
}
Example 5
#include <iostream>
using namespace std;
int main ()
{
int charactersNumber;
cout << "How many characters would you like to input: ";
cin >> charactersNumber;
char *characters = new char[charactersNumber];
for (int i = 0; i < charactersNumber; i++)
{
cout << i+1 << " character: ";
cin >> characters[i];
}
cout << "The inputted string of characters was: ";
for (int i = 0; i < charactersNumber; i++)
{
cout << *(characters+i);
}
delete [] characters;
return 0;
}
Example 6
#include <iostream>
using namespace std;
int main ()
{
int arr[5];
int *pArr = arr;
for (int i = 0; i < 5; i++)
{
cout << "Input " << i+1 << " number: ";
cin >> *(pArr++);
}
for (int i = 0; i < 5; i++)
{
cout << "Number " << i+1 << ": " << arr[i] << endl;
}
return 0;
}
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