simple-programming-language-using-flex-and-bison

This is a project that I have done in my 3rd year as a CSE student. A simplistic programming language compiler using flex and bison.

Step 1: I think a demo program is able to express the structire of my language. Think of it as an unpolished version of 'C' with different syntax.

Structure of my language:

 import std.h
 import con.h
 func main()
{
||this is a single line comment

int var :         || this is a declartion
var = 4:
var = 2*var+6:
print(var):


int a:
a = 4:
s=0:
float a:
if(a==1)
{
    print(a):
}
elif(a==2)
{
    print(a):
}
else
{
    print(a):
}

int x,inc:
x = 10+15:
print(x):
x = x + x:
print(x):
power(56,2):
int a1,b1,zzz,xxx:
switch(x)
{
    case 1 ~
    a1=1 :
    case 2 ~
    b1=2:
    default ~
    xxx=3:
}

a1=1000:
b1=10:
print(b1):
for (a1=1: b1=10: inc=1:)
{
    print(x):
}

}

step 2: How to run:

i) clone this repository on your computer.

ii) unzip the file in your preferred directory.

iii) open cmd on that directory.

iv) type the following on cmd-

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

v) open out.txt to see the output

vi) open input.txt to edit your input text for further uses.