Conditional Execution Assignment: Selection Control Structures

Java Version: 1.7-1.8

Game Version: SpaceSmasher1.0

Authors: Kelvin Sung, Mike Panitz, Rob Nash, and ET. AL.

Prerequisites

You must have completed both the Setting Up Java LabandSetting Up SpaceSmasher Lab to start the first Assignment.

Summary

The focus of this assignment is todemonstrate your understanding of conditional execution (also called branching) in ourSpaceSmasher sandbox. There are three levels to this assignment, and all students must complete the first level for credit; the next levels are more challenging, optional, and must be completed in order like a dungeon.

AssignmentOutcomes

Demonstrate proficient use of the Selection Control structures in Java in the context of a real-world, industry grade software simulation. The different forms of the IF Control Structure you should use are highlighted here:

The Single If

if( <someBooleanExpression> ) {…}

A Set of Sequential If Statements

if( <someBooleanExpression> ) {…}

Compound Boolean Conditions(using & and ||)

if( <booleanExpressionA> & <booleanExpressionB> ) {..}

if( <booleanExpressionA> || <booleanExpressionB> ) {..}

The Single If/Else Structure(With Default Else)

if( <someBooleanExpressionA> ) {

//codeBodyA

} else ( <someBooleanExpressionB> ) {

//codeBodyB

}

Chained If/ElseIF Statements Without Default Else

if( <queryA> ) {

//codeBodyA

} else if( <queryB> {

//codeBodyB

}

Chained If/ElseIF Statements With Default Else

if( <queryA> ) {

//codeBodyA

} else if( <queryB> {

//codeBodyB

} else {

//defaultCodeBodyC

}

Warmup with the Single If Statement

Given the following variable declarations and main(), write IF statements that correspond with the questions below. Compile and execute your code, and submit both the code you wrote and the console output it produces when you are done.

Report to the console if the variable called“number” is negative using System.out.println().
Report if the number is zero next.
Print out “the number is even” if the “number” variable holds an even value, else print out “the number is odd”.
Print to the console “The grade is above an 89” if it is, in fact, an A.
Describe the current temperature as“higher than 78 degrees” or “less than or equal to 78 degrees”
Print to the console if the class average was below a 65
Let the user know if the value in the variable “answer”is true
Next, report if the value in “answer”is not true
Output to the console if the value in“grade” was above 83 AND less than 90
Is the number (positive AND odd) OR (zero AND even)? If it is, say “yes” and if it’s not, say “no” on the console.

publicstaticvoid main(String[] args) {

intnumber = -1;

//TODO 1

number = 0;

//TODO 2

number = 2;

//TODO 3

doublegrade = 89.5;

//TODO 4

doubletemperature = 79.2;

//TODO 5

doubleaverage = 70;

//TODO 6

booleananswer = false;

//TODO 7

//TODO 8

grade = 85.5;

//TODO 9

number = 50;

//TODO 10

}

SpaceSmasher Level 1 Assignment

In this part, we’ll complete the first homework level by enabling the paddle to move up and down in addition to the left and right movements already implemented in the lab. In more advanced versions of this level, we could watch out for paddle and block collisions, but for now, the paddle will move right on through the blocks and still produce a bounce effect on the ball when colliding with the ball. To accomplish this behavior, you’ll need to use one of the IF or IF/ELSE structures covered in the lab or the slides. Provided for you is an animated gif that displays how our new game would play when completed.

INSERT GIF HERE

SpaceSmasher Level 2 Assignment

Prerequisites

This level of assignment is inaccessible until level one has been completed.

Summary

In level one, you played the block breaker game from “left-to-right” where you lose a life at the bottom of the screen. For level two, rotate your head 90 degrees clockwise and you have the next (much harder) SpaceSmasher version. In this version, your paddle will be on the left side of the screen and move only up and down to defend your life (or lives). You’ll guard the leftmost part of the screen from the ball, since you’ll lose a life if the ball hits that edge of the screen rather than the bottom. Look at the included animation to see this radically altered version in action.

ADD GIF HERE

SpaceSmasher Level 3 Assignment

Prerequisites

This level of assignment is inaccessible until level two has been completed.

Summary

This level offers the student a choice. Modify the SpaceSmasher game in any meaningful way to obtain credit here. For example, add a score, power-up, or different sounds, as long as the IF or IF/ELSE structures are used.

ADD GIF HERE

SpaceSmasher Level 4 Assignment

Prerequisites

This level of assignment is inaccessible until level two has been completed; it is not a requirement that level three be completed before approaching level four.

Summary

Extend SpaceSmasher to be 2 players, similar in spirit to a game of Pong (search term: Nolan Bushnell). The first player will operate the paddle down south as usual, but a second player using the keys {W,S,A,D} will operate a second paddle at the top of the screen. The shortest version of this has the players sharing lives and working cooperatively to clear the board of blocks, but longer competitive versions could also be designed here. Look at the animated gif for an example implementation of this in action.

Conditional Execution Assignment: Selection Control Structures