c language structures and pointers

1. You have a struct defined as

struct Coordinate
{
int x;
int y;
};

And you have variables defined from it:

Coordinate point1;
Coordinate point2;

Show just the code needed to access the y value of point2.

2.

The formula to find the distance between two points is:

Using the struct definition in the previous questions, show the code needed to find the distance between point1 and point2, using cmath functions as needed.

Show just the line of code to produce the distance – do not show any include statements or an entire program.

3.

A pointer is a variable that contains a value that is

4.

How would you use the parameter f in the body of this function to access the numerator field?

void reduce(Fraction &f)

{

}

f->numerator

f*numerator

f.numerator

5.

The function argument in the previous question is defined as a

pointer variable

reference variable

primitive variable

6.

You have this definition:

struct FractionArray
{
Fraction *fractions;
int nFractions;
};

And these statements:

FractionArray fractions;

fractions.nFractions = 100;

fractions.fractions = new Fraction[fractions.nFractions];

Using the new operator as in the code above means that you are

creating a variable

creating a pointer

initializing a pointer by asking the system to allocate some memory

initializing a reference variable

7.

Once you dynamically allocate memory, and you no longer need it to use it, what do you do?

nothing

return the memory to the system

set the value of the pointer to 0 New Question New Question

 

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