#Apa itu algoritma pemrograman code

This may seem like a trivial distinction when passing a hard-coded number, but it is not so trivial when passing a variable.ģ4 Passing a Copy The following code has a function entitled randomizer() that receives one argument (a floating point number) and adds a random number between -2 and 2 to it. Before tossing the ball (the argument), you make a copy of it (a second ball), and pass it to the receiver (the function).ģ3 Passing a Copy Whenever you pass a primitive value (integer, float, char, etc) to a function, you do not actually pass the value itself, but a copy of that variable. What I really should have said is the following.

You (the main program) call the function (your friend) and pass the ball.ģ2 Passing a Copy There is a slight problem with the “playing catch” analogy. Imagine a lovely, sunny day and you are playing catch with a friend in the park.

We will not be able to advance our programming knowledge unless we are comfortable with this technique. The concept to focus on is this ability to pass parameter. The concept to focus on is this ability to pass parameters is rather trivial and we should not be terribly concerned if we confuse the use of the two words from time to time.Ģ7 Arguments The semantic difference between arguments and parameters is rather trivial and we should not be terribly concerned if we confuse the use of the two words from time to time. Paremeters are the values passed into the function when it is called, that is, “drawCar(80, 175, 40, color(100,0,100)) ”Ģ6 Arguments The semantic difference between arguments and parameters is rather trivial and we should not be terribly concerned if we confuse the use of the two words from time to time. See the output in Figure 7.3.Ģ5 Arguments Technically speaking, arguments are the variables that live inside the parentheses in the function definistion, that is, “void drawCar(int x, int y, int thesize, color c)”.

#Apa itu algoritma pemrograman how to

To demonstrate this, we will look at code for drawing a collection of shapes and examine how functions allow us to draw multiple versions of the pattern without retyping the same code over and over.ġ0 Arguments Leaving Zoog until bit later, consider the following pattern resembling a car(viewed from above as show in Figure 7.1).ġ1 Arguments How to Make It in Figure 7.1?ġ5 Arguments To draw a second car, we repeat the above code with different values, as shown in Figure 7.2.ġ9 Arguments It should be fairly apparent where this is going.Īfter all, we are doing the same thing twice, why brother repeating all that code? To escape this repetition, we can move the code into a function that displays the car according to several arguments(position, size, and color).Ģ2 Arguments In the draw() function, we then call the drawCar() function three times, passing four parameters each time. For example: Move(mouseX/10) ĩ Arguments Arguments pave the way for more flexible, and therefore reusable, function. The white circle wiill be sized according to to the value placed in parantheses.Ħ Arguments Looking at the bouncing ball example, we could rewrtite the move() function to include an argument:ħ Arguments In order to move the ball twice as fast: Move(2) Ĩ Arguments We could also pass another variable or the result of a mathematical expression (such as mouseX divided by 10) in the function. This variable is a local variableto be used in that function (and only in that function). These are ellipse() function arguments and we encountered this in Chapter 1 when we learned to call functions for the first time.Ĥ Arguments Let’s write drawBlackCircle()to include an arguments:ĥ Arguments An argument is simply a variable declaration inside the parentheses in the function definition. We can’t just say draw an ellipse, we have to say draw an ellipse at this location and with this size. Instiead of merely saying “Move, “ a function might say “Move N number of steps”, where “N” argumentģ Arguments When we display an ellipse in Processing, we are required to specify details about that ellipse. You can think of them as conditions under which the function should operate. 2 Arguments Arguments are values that are “passed” into a function.