- ..clause 1..: All are machine languages.
- ..clause 2..: Appearance of programming language
- ..clause 3..: C language translation software
Though the previous paragraph easily said to it that it will operate the program
Here, it will explain that more in detail.
To begin with, you pass and the program described ahead ..usual character string.. doesn't pass.
Though you also think that it has heard that the computer is working by the binary number
Does the computer that moves by the binary number move recognizing the character string why?
Originally, being able to understand for the computer is only an instruction written by the binary number.
It is instruction ････ written by the binary number, and it is a guy so-called who says the machine language (machine language).
[ Image of machine language ]This is mistaken the image by this only though arranges one for 0 and doesn't exist in [detarame].
It is only a machine language (machine language) that can understand the computer.
However, it seems to faint in this.
Then, to be thought first of all is to shorten the digit of the figure.
[ Machine language of hexadecimal number ]It is a mode of expression called this is a so-called hexadecimal number.
01 85 AD 7F 7C A4 FA 6B AD
06 F5 AB 74 7E DC 18 FA A4
01 7F A7 C5 D8 6B 4E A4 FA
[ Assembler ]Though the programming fairly became efficient by this symbolization
[ FORTRAN (FORTRAN) ]It becomes near English and a considerable expression if coming here, and even the normal person understands if it studies.
DO 10 I=1,10000
[ High-level language ]
Programming language that man can plainly write.
On the other hand, the machine language and the assembly are called a low-level language.
Because the high-level language is a language that man thought about, it is not possible to understand to the computer.
Though it is also possible that this work, and man does of course by the hand work
Then, there is neither doing the programming after all by the machine language nor a great difference.
Therefore, the software to translate exists.
There are chiefly two kinds of translation method, and the method of translating everything at a dash is used for C language.
[ Simultaneous translation ]
In other than C language the languages, there is a type to do the simultaneous translation, too.
They are called an interpreter.
It is a fault that the speed is low-speed though a flexible composition can be done.
Software that compiles, and translates this translation is called a compiler.
[ C language interpreter ]
There is an environment of the interpreter type also in C language.
It is possible to execute it while confirming the program one by one.
Though it is very convenient for the bug correction
So that the speed that is the advantage of maximum C language is sacrificed
It is never used by the practical purpose.
This compiler actually operates by the mechanism of three stages.
[ Compiler ]
Software that translates character string file written by C language into machine language.
First of all, the character string is adjusted to the start with software of pre-processor.
Replace uniting and the sign of the blank and changing line and make the program easy to analyze.
Moreover, # define quasi-instruction etc. described later are processed here.
Next, optimization is done at this time though it is compiled by the compiler.
Because the speed when operating by the method of the translation is different, even the program of same C language :.
The compiler is translated as becoming more high-speed.
Finally, these translated machine language programs are united with software of linker.
[ Optimization ]
Function that translates into machine language devising it at high speed or more to operate.
[ Flow of compilation ]The file that became an executable file (in short, EXE file)
Program and source code of C language
[Puripurosesu](adjustment of character string)
Executable software and executable file
- It might be called that it compiles bringing [puripurosesu], the compilation, and the link together.
Moreover, might it bring together into making an executable file and it be called the build.
Because these a series of work is completely automated now
The software that can be operated is made only from pushing the button usually ..us.. no consideration especially.