We will discuss about  identifier and instructions in this chapter.

Identifier: 

Language is a medium of communication between two persons, as 

like that c language is a medium of communicate with machine and

persons. This is one way communication a programmer communicate

with machine programmer gave command to machine . If any person

learn any language then firstly he learn about alphabet then make word,

in c language every word is called identifier. In identifier we will discuss

about  constant ,variable and keywords.

Instructions:

Instructions are the combination of identifier .Instruction means giving 

command to the machine ,there will be different type of instructions like

data declaration instructions, input/output instructions ,arithmetic instruction

control instructions etc.

Collection of instructions is called Program.   

we will understand these term in  below given picture

 

so in this picture we can see that characters make identifier and

identifier makes instructions and lots of instructions make a 

Program.

In next chapter we will discuss about constants ,variable

and keywords.

  

Software development process

Software development process in c language.

what is software : 

Software is a collection of programs .Software is used to operate computer and doing specific task.

Software is a executable file which extension is .exe .

In this chapter we will discuss about how to make a software files in c programming language.

we will describe about the above figure about software development process.

If we make a simple programs  in c language, we make a  file  which extension is .c.

this is our source file in which we writes a programs.

 

pre-processor:

preprocessor is a program which perform before compilation process.

# is a preprocessor directives so , all statement which are included with # compiles 

with the help of preprocessors.

Header files:

All explanation of preprocessors are written in header files .

so with preprocessor and header files we make  new file which extension is .i

all  #(preprocessor ) will be translated before makes .i files.

 Compiler: 

compiler translate our code into machine language, compiler select all the code 

at a time and translate it into machine code.

.obj file:

After compiling all the code we found a .obj file in which our machine code is 

present in form of (0 and 1) and after with the help of linker and library file we

make our .exe file

linker provide linking between compiler and library files.

library files are files in which all details are present about predefined function.

.exe file:

This is executable file ,which are called software.