Question

C++ 29.5 Lab 29: Pointers

Exercise:

Before the main function, declare a struct called Movie which has title as a string and year as the integer as the member variables. Also before the main function, instantiate an object of Movie called m with initial value "Avengers" as title and year as 2019. Note m is the global variable and A in the title is uppercase. Also before the main function, declare another global variable which is a pointer to the movie object m named ptr and make it point to m.

In the main function, output the title and the year of m to the console separated by a space so that the output is "Avengers 2019" with a new line at the end.

Next in the main function, change the value of m so that the title of m is "Shrek" and the year is 2001 by manipulating ptr only. Again you should do this not using the variable m directly but using the pointer ptr instead.

Now output the value of m again by directly using the variable m. Double check the values got changed. Again, the title and the year should be separated by a space and have a new line at the end. So the new output should be "Shrek 2001" with a new line (note that S is the uppercase)

Answer 1

C++ Program:

#include <iostream>
#include <string>

using namespace std;

//Declaring a structure
struct Movie
{
string title;
int year;
};

//Creating object
struct Movie m = {"Avengers", 2019};

//Creating Pointer
struct Movie *ptr = &m;

//Main function
int main()
{
//Printing Structure values
cout << m.title << " " << m.year << endl;

//Changing values
ptr->title = "Shrek";
ptr->year = 2001;

//Printing values
cout << m.title << " " << m.year << endl;

return 0;
}

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Sample Run: