Answer to Question #208912 in C++ for Ahmed Ali

Question

1) Write a program that declares a structure to store the record of a book. It defines a structure variable, input the values and displays them using pointer.

2) Write a program that input two integers and passes them to a function using pointers. The function exchange the values and the program finally display the values.

Answer 1

1)

#include <iostream>


using namespace std;
struct Book
{
    string book_name;
    string book_no;
    string book_author;
};
int main()
{
    Book *ptr, b;
    ptr = &b;
    cout<<"\nEnter the name of the Book: ";
    cin>>(*ptr).book_name;
    cout<<"\nEnter the number of the Book: ";
    cin>>(*ptr).book_no;
    cout<<"\nEnter the author of the Book: ";
    cin>>(*ptr).book_author;
    
    cout<<"\nBook name: "<<(*ptr).book_name<<endl;
    cout<<"\nBook number: "<<(*ptr).book_no<<endl;
    cout<<"\nBook author: "<<(*ptr).book_author<<endl;
    return 0;
}

2)

#include <iostream>


using namespace std;
void swap(int *a,int *b)
{
    int temp;
     temp   = *a;
    *a   = *b;
    *b   =  temp;
}
int main()
{
    int x,y;
    cout<<"\nEnter a number: ";
    cin>>x;
    cout<<"\nEnter another number: ";
    cin>>y;
    cout<<"\nBefore swaping: ";
    cout<<"\nx= "<<x<<"\ty= "<<y<<endl;
    swap(&x,&y);
    cout<<"\nAfter swaping: ";
    cout<<"\nx= "<<x<<"\ty= "<<y<<endl;
    return 0;
}