$/*$

$*$ An exercise to help you understand the use of pointer variables.

$*/$

#include

int main$($void$)$

$\{$

int foo;

int bar;

int $*$fred;

int $*$sam;

bar $=100$;

foo $=200$;

fred $=$ &foo;

$/*$ point one $*/$

printf$("$point one: foo is $\%$d and bar is $\%$d$.$

$",$ foo, bar$)$;

sam $=$ &bar;

$*$sam $+=30$;

$*$fred $-=40$;

$/*$ point two $*/$

printf$("$point two: foo is $\%$d and bar is $\%$d$.$

$",$ foo, bar$)$;

fred $=$ &bar;

$*$fred $+=5$;

$/*$ point three $*/$

printf$("$point three: foo is $\%$d and bar is $\%$d$.$

$",$ foo, bar$)$;

printf$("$point three: $*$fred is $\%$d and $*$sam is $\%$d$.$

$",*$fred$,*$sam$)$;

sam $=$ &foo;

$*$sam $=*$fred;

$/*$ point four $*/$

printf$("$point four: foo is $\%$d and bar is $\%$d$.$

$",$ foo, bar$)$;

$*$sam $*=100$;

sam $=$ fred;

$/*$ point five $*/$

printf$("$point five: foo is $\%$d and bar is $\%$d$.$

$",$ foo, bar$)$;

printf$("$point five: $*$fred is $\%$d and $*$sam is $\%$d$.$

$",*$fred$,*$sam$)$;

return $0$;

$\}$