arafatrohan93 / compiler-h

This is a compiler project designed for Compiler Design course.

Compiler-H

It is Built with Flex and Bison.

This is a compiler project designed for Compiler Design course.

Clone

https://github.com/ArafatRohan93/Compiler-H

Syntax

• Calling Main Function

void_main ( )
{{ ... }}

• Statement Terminator

<br>

• Declaring Variables

$_int_$  a:=50

• Operators

Symbol	Action
:=	Assignment
^	Power
+	Plus
-	Minus
*	Multipliation
/	Division
>	Greater Than
<	Lesser Than
==	Is Equal
>=	Greater or Equal
<=	Lesser or Equal
!=	Not Equal
!	Factorial

• Scope Resolution Operator

Symbol	Action
{{	Start of scope
}}	End of scope

• if-else Supports Nested if properties

 if (1):
       {{ 5 }}
   else:
       {{ 7 }}

if (2 > 3):
   	{{ 1 }}
    else:
      {{
        if (0):
          {{ 5 }}
         else:
           {{ 7 }}
    }}    

• Loops
• For Loop

for ( x := 0 , x <= 4, x ++ ) 
{{
 print(5) <br>
}}

• While Loop

while(i<5):
{{
 z<br>
 i++<br>
}}

• Function
• Declaration Must be inside Main()

return_type function name()
{{ 
 ...
}}

Example :

$_int_$ function oddeven1 ( )
       {{
          13 <br>
       }}

• Calling Function

function oddeven1 ( )

Installation

• First install Flex and Bison on your machine.

Compilation and Execution

1.Open Command prompt and switch to your working directory where you have stored your lex file (“.l“) and yacc file (“.y“).

2.Let your lex and yacc files be “rhn.l” and “rhn.y“. Now, follow the preceding steps to compile and run your program.

• For Compiling Lex file only:

flex hello.l
gcc lex.yy.c

• For Compiling Lex & Yacc file both:

flex hello.l
bison -dy hello.y
gcc lex.yy.c y.tab.c

• For Executing the Program

a.exe