Exercise_20_16

[csv77]

Hi,
I tested this program, and I think something is wrong:
if I try to convert to following expression: 2 * (1 * 2 + 3), I will get 2 1 2 3 + * , instead of 2123+*.
I made a different solution with one stack for the operators and parentheses with the help of the conversion rules on this link:
http://csis.pace.edu/~wolf/CS122/infix-postfix.htm