CompilerInJava

Basic compiler written in java

##How to run this :-

####Using Eclipse -

Import project into eclipse and edit code in CompilerInJava/Compiler/code.pc and compile Main.java to execute.

####Alternate Method -

Run either .bat (WINDOWS) or .sh(LINUX) to automatically execute the code and see output. After first execution of the script, a code.pc file will be created in the current directory. Edit code in this file and execute script to see the output.

####This includes:-

######Basic operations like +(addition), -(subtraction), *(multiplication), /(division)

######Data types and variables (integer, float, string)

######Arrays for data types (integer, float, string)

######Control Statements -> If-else, while loop

####Examples :-

For integer

a = 4

For float

a=4.2

For string

a="Hello World"

####Implicit Functions

print() -- print function

print("Hello World")
Result :- Hello World

println() -- println function --> prints the data then move to the newline

println(3+5.3)
Result :-  8.3

####String Manipulation : -

String concatenation

str="Hello " + 4.5
println(str)
Result :- Hello 4.5
    OR
str="Hello "
str=str+"World "+4
println(str)
Result :- Hello World 4

String Repeat

str="Hello"*3
println(str)
Result :- HelloHelloHello
    OR
str="hello"
str=str*4
println(str)
Resutl :- hellohellohellohello

####If-else : -

For integer and float -> ==,!=,>=,<=,>,<, null,!null

For string -> null,!null,==,!= (memory reference)

null and !null

str="Hello"
if str null:
	println("null")
else: if str!null:
	println("not null")
else:
	println("not deined")
;
Result :- not null

Basic if-else

a=4
b=3
if a>b:
	println(a)
else:
	println(b)
;
Result :- 4

Nested If-else

a=4.5
b=6.5
if a>=b:
	if a==b:
		println(a)
	else:
		println(b)
else: if a<b:
	println("B"+b)
	println("greater than A"+a)
else:
	println("Not")
;
Result :- B6.5
	  greater than A4.5

####Loops : -

while loop

a=4
b=9
while a<=b:
	println(a)
	a=a+1
;
println(a)
Result :- 4
	  5
	  6
	  7
	  8
	  9
	  10

####Arrays : -

######Bugs :-

Printing array values along with string does not work but works for integer and float

Assigning a value to a float array value does not work for (float + variable) but works for (variable + float)

######Examples :-

For integer

a=[2]i
a::0=1
a::1=2
println(a::0)
println(a::1)
Resutl :- 1
	  2

For float

a=[5]f
b=0
while b<5:
	a::b=b+4.5
	println(a::b)
	b=b+1
;
Result :- 4.5
	  5.5
	  6.5
	  7.5
	  8.5

For string

a=[5]S
b=0
while b<5:
	a::b="Hello"+b
	println(a::b)
	b=b+1
;
Result :- Hello0
	  Hello1
	  Hello2
	  Hello3
	  Hello4