Ex$4\mathrm{.}10,11$: Replace C$99$ comments

The original $1989$ ANSI $/1990$ ISO C standard $($ANSI C$,$ C$90)$ only permits $/**/$ style comments:

$\frac{?}{?}**$ This is a comment $*\frac{*}{?}$

$\frac{?}{?}**$ This is

a multiline comment $*/$

The $1999$ ISO standard $($C$99)$ provides line$-$oriented comments starting with a $//$ combination:

Task

Starting with the program fortcomm.c shown in Figure $4\mathrm{.}13$ on page $58($also found in "Reading

data with loops"$),$ write a program that replaces each c$99-$style comment in the input text by an

equivalent ANSI C comment.

That is$,$ each $//$ pair that commences a comment should be replaced by $\frac{?}{?}***,$ and then a $*/$

combination should be inserted immedlately prior to the next newline character.

Sample output

The program should not prompt for input. Any input given to it should be outputted with C$99-$style

comments being replaced with ANSI C comments.

$//$ My useful program

#include $$stdio$.$h$>$

int main$()$ Our main function $*/$

printf$("$Hello world! $\{\frac{\text{:}}{?}$

${?}^n)\frac{\text{;}}{\frac{?}{?}}\frac{\frac{?}{?}}{?}$ print hello

$//$ done, phew!

return $$

$\}$

bash$ $./$program $$ input.c

$\frac{?}{?}**$ My useful program $*/$

#include $\{\frac{\text{:}}{?}$

${?}^n)\frac{\text{;}}{*}*a*\frac{*}{?}\frac{\frac{?}{?}}{\frac{?}{?}}\frac{?}{?}******************************\frac{\frac{?}{?}}{?}\{\frac{\text{:}}{?}$

${?}^n)\frac{\text{;}}{*}*\frac{\frac{?}{?}}{?}\frac{\frac{?}{?}}{\frac{?}{?}}\frac{?}{?}**\frac{*}{\frac{?}{?}}********************************\frac{*}{?}\frac{?}{?}**\frac{\frac{\text{:}}{?}}{*}$

${?}^n*\frac{\text{;}}{?}\frac{?}{?}$