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Loop...without the loop
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Hi. I'm in a Java class at harvard, and they gave us this assignment to create a function moveKiloMile(); , which moves an on-screen robot 1000 units. We can declare the function by using a function moveMile(); , which moves the robot 8 units. Below is the code that I wrote. I'm trying to find out how to do the kilomile function without using a loop, since the professor says that its relatively short.
To download the program we created this in, visit http://www.fas.harvard.edu/~libs111 and click the "Karal" button on the left column.
Thanks!
Ian
Java Syntax (Toggle Plain Text)
To download the program we created this in, visit http://www.fas.harvard.edu/~libs111 and click the "Karal" button on the left column.
Thanks!
Ian
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Join Date: Feb 2002
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Oh my goodness gracious! What I suggest is to possibly use a recursive function, since you can't use a loop. This calls a function multiple times until a condition is met. (You pass the parameters for the condition into the function). Tell me if this works:
However, in the main function, you will have to call moveKiloMile(1000) to indicate you want to run moveMile 1000 times. Otherwise, you could do moveKiloMile(5) to run moveMile 5 times, and, well, you get the idea.
Other than that, it works!
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However, in the main function, you will have to call moveKiloMile(1000) to indicate you want to run moveMile 1000 times. Otherwise, you could do moveKiloMile(5) to run moveMile 5 times, and, well, you get the idea.
Other than that, it works! 
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Just noticed you wrote this isn't in Java, it's in JKarel. I downloaded the JKarel Users Manual you provided a link to, and it says to do this:
or, alternatively
Actually, I would assume if your teacher/professor said not to use a "loop" he was referring to the former and wants you to use "while" instead. However, in real programming, the former refers to a for loop while the later refers to a while loop.
In any case, I'm not sure if you can use the code for the "while" I've provided only because I don't see that JKarel supports variables of any kind - only calling functions.
Java Syntax (Toggle Plain Text)
or, alternatively
Java Syntax (Toggle Plain Text)
Actually, I would assume if your teacher/professor said not to use a "loop" he was referring to the former and wants you to use "while" instead. However, in real programming, the former refers to a for loop while the later refers to a while loop.
In any case, I'm not sure if you can use the code for the "while" I've provided only because I don't see that JKarel supports variables of any kind - only calling functions.
I don't see how someone can tell you to write something efficient without a loop (in this language anyways). Another way to do it besides recursion is to create a label and jump to it if your language supports it. (Kind of like Basic's GOTO.) Jumps are used more in lower level languages like assembly. This seems to be a higher level one, so a jump wouldn't be the best way but it would work.
Check out my blog at http://www.shinylight.com for more stuff about web dev.
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According to what I saw of the how-to, no labels are supported either. Just functions and function calls!
Then the teacher is whacked.
Check out my blog at http://www.shinylight.com for more stuff about web dev.
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According to the how-to, which is basically meant as an "intro to the java language" there is something called loop(x) where x is an integer value, not a variable. Then there is something else called while(condition). When the teachers says don't use a loop, I think he/she means to use a while. According to the how-to, the "while" isn't associated with a "loop". See what I'm saying?
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Originally Posted by theQube
Hi. I'm in a Java class at harvard...
Check out my blog at http://www.shinylight.com for more stuff about web dev.
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