2.1.7 Compiling the Parser File
Here is how to compile and run the parser file:
| | # List files in current directory.
$ ls
rpcalc.tab.c rpcalc.y
# Compile the Bison parser.
# ‘-lm’ tells compiler to search math library for pow.
$ cc -lm -o rpcalc rpcalc.tab.c
# List files again.
$ ls
rpcalc rpcalc.tab.c rpcalc.y
|
The file ‘rpcalc’ now contains the executable code. Here is an
example session using rpcalc.
| | $ rpcalc
4 9 +
13
3 7 + 3 4 5 *+-
-13
3 7 + 3 4 5 * + - n Note the unary minus, ‘n’
13
5 6 / 4 n +
-3.166666667
3 4 ^ Exponentiation
81
^D End-of-file indicator
$
|
