For Dummies Beginning Programming with C++ 978-0-470-61797-7 사용자 설명서

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As detailed as these instructions might seem to be, this is not a program. 
This is called an algorithm. An algorithm is a description of the steps to be 
performed, usually at a high level of abstraction. An algorithm is detailed but 
general. I could use this algorithm to repair any of the flat tires that I have 
experienced or ever will experience. But an algorithm does not contain suf-
ficient detail for even our intentionally obtuse human computer to perform 
the task.

The Tire Changing Language

Before we can write a program, we need a language that we can all agree on. 
For the remainder of this book, that language will be C++, but I use the newly 
invented TCL (Tire Changing Language) for this example. I have specifically 
adapted TCL to the problem of changing tires.

TCL includes a few nouns common in the tire-changing world:

 ✓ 

car

 ✓ 

tire

 ✓ 

nut

 ✓ 

jack

 ✓ 

toolbox

 ✓ 

spare tire

 ✓ 

wrench

TCL also includes the following verbs:

 ✓ 

grab

 ✓ 

move

 ✓ 

release

 ✓ 

turn

Finally, the TCL-executing processor will need the ability to count and to 
make simple decisions.

This is all that the tire-changing robot understands. Any other command 
that’s not part of Tire Changing Language generates a blank stare of incom-
prehension from the human tire-changing processor.

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