Struct declaration and behavior in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a struct named Point.

C Sharp (C#)

public [1] Point { public int X; public int Y; }

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Aclass

Benum

Cstruct

Dinterface

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'class' instead of 'struct' will create a reference type, not a value type.

The keyword struct is used to declare a value type in C#.

2fill in blank

medium

Complete the code to create a new Point struct instance with X=5 and Y=10.

C Sharp (C#)

Point p = new Point() { X = [1], Y = 10 };

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A5

B10

C0

D15

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the values of X and Y.

Using zero instead of 5 for X.

We assign X the value 5 as required.

3fill in blank

hard

Fix the error in the code to correctly assign one Point to another.

C Sharp (C#)

Point p1 = new Point() { X = 1, Y = 2 };
Point p2;
p2 = [1];

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Ap1

Bnull

Cnew Point()

Ddefault

Attempts:

3 left

💡 Hint

Common Mistakes

Assigning null to a struct variable causes an error.

Using 'new Point()' creates a new default struct, not a copy.

Assigning p1 to p2 copies the struct values.

4fill in blank

hard

Fill both blanks to complete the method that returns the distance from origin.

C Sharp (C#)

public double Distance() {
    return Math.[1](X * X + Y * Y);
}

// Usage:
Point p = new Point() { X = 3, Y = 4 };
double dist = p.[2]();

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ASqrt

BDistance

CLength

DMagnitude

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect math functions like Distance or Length which don't exist in Math class.

Calling a method name that doesn't match the declared method.

The method Math.Sqrt calculates the square root. The struct method is called Distance, and usage calls the method name, which is the same here.

5fill in blank

hard

Fill all three blanks to complete the struct with a constructor and a method that moves the point.

C Sharp (C#)

public struct Point {
    public int X;
    public int Y;

    public Point(int x, int y) {
        [1] = x;
        [2] = y;
    }

    public void Move(int dx, int dy) {
        X += [3];
        Y += dy;
    }
}

Drag options to blanks, or click blank then click option'

AX

Bdx

Cdy

DY

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up field names and parameter names.

Adding dy to X instead of dx.

The constructor assigns parameters to fields X and Y. The Move method adds dx to X and dy to Y.