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|
//DECL
%baseclass-preinclude cmath
%token NUM
%stype double
//=
%%
//RULES
input:
// empty
|
input line
;
line:
'\n'
|
exp '\n'
{
std::cout << "\t" << $1 << std::endl;
}
;
exp:
NUM
|
exp exp '+'
{
$$ = $1 + $2;
}
|
exp exp '-'
{
$$ = $1 - $2;
}
|
exp exp '*'
{
$$ = $1 * $2;
}
|
exp exp '/'
{
$$ = $1 / $2;
}
|
// Exponentiation:
exp exp '^'
{
$$ = pow($1, $2);
}
|
// Unary minus:
exp 'n'
{
$$ = -$1;
}
;
//=
|
