Experiment $2($PreLab task $-$ to be prepared in advance$)$

Program $4\mathrm{.}2$ is prepared for eveluating a given postfix expression. When you run this program postfix expression must be given as input string and program will generate an output as numeric real number that is called as evaluated value.

Hint : postfix expression consist of one digit numeric operands and operators and only.

Example data for the program could be as follows

a$)$ If you give input string as

$\frac{9142}{+}-23*/$ Program will generate evaluated output as $1\mathrm{.}0$

b$)$ If you give input string as

$3923$$$-**6+$ and evaluated value as $9\mathrm{.}00$