#include

using namespace std;

int main$()\{$

char input;

do $\{$

cout $<<"------------------------------$

$"$;

cout $<<$ "Welcome to a geometry calculator!

$"$;

cout $<<$ "Insert $\text{'}$R$\text{'}$ for Rectangle.

$"$;

cout $<<$ "Insert $\text{'}$S$\text{'}$ for Square.

$"$;

cout $<<$ "Insert $\text{'}$T$\text{'}$ for Triangle.

$"$;

cout $<<$ "Insert $\text{'}$C$\text{'}$ for Circle.

$"$;

cout $<<"$

Insert $\text{'}$Y$\text{'}$ to continue.

$"$;

cout $<<$ "Insert $\text{'}$N$\text{'}$ to finish the program.

$"$;

cout $<<"------------------------------$

$"$;

cout $<<$ "Please select your choice

$"$;

cout $<<$ "Input: $"$;

cin $>>$ input;

const double PI $=3\mathrm{.}14$;

double value$1=0$;

double value$2=0$;

double area $=0$;

switch $($input$)\{$

case $\text{'}$r$\text{'}$:$//$ accept a lower case

case $\text{'}$R$\text{'}$:

cout $<<$ "RECTANGLE $-$ Solve for area

$"$;

cout $<<$ "Length: $"$;

cin $>>$ value$1$;

while $($value$1<=0)\{$

cout $<<$ "Try again!

A positive number please: $"$;

cin $>>$ value$1$;

$\}$

cout $<<$ "Width: $"$;

cin $>>$ value$2$;

while $($value$2<=0)\{$

cout $<<$ "Try again!

A positive number please: $"$;

cin $>>$ value$2$;

$\}$

area $=$ value$1*$ value$2$;

cout $<<$ "Area $="<<$ area $<<$ endl;

break;

case $\text{'}$s$\text{'}$:

case $\text{'}$S$\text{'}$:

cout $<<$ "SQUARE $-$ Solve for area

$"$;

cout $<<$ "Side: $"$;

cin $>>$ value$1$;

while $($value$1<=0)\{$

cout $<<$ "Try again!

A positive number please: $"$;

cin $>>$ value$1$;

$\}$

area $=$ value$1*$ value$1$;

cout $<<$ "Area $="<<$ area $<<$ endl;

break;

case $\text{'}$t$\text{'}$:

case $\text{'}$T$\text{'}$:

cout $<<$ "TRIANGLE $-$ Solve for area

$"$;

cout $<<$ "Base: $"$;

cin $>>$ value$1$;

while $($value$1<=0)\{$

cout $<<$ "Try again!

A positive number please: $"$;

cin $>>$ value$1$;

$\}$

cout $<<$ "Height: $"$;

cin $>>$ value$2$;

while $($value$2<=0)\{$

cout $<<$ "Try again!

A positive number please: $"$;

cin $>>$ value$2$;

$\}$

area $=($value$1*$ value$2)/2$;

cout $<<$ "Area $="<<$ area $<<$ endl;

break;

case $\text{'}$c$\text{'}$:

case $\text{'}$C$\text{'}$:

cout $<<$ "CIRCLE $-$ Solve for area

$"$;

cout $<<$ "Radius: $"$;

cin $>>$ value$1$;

while $($value$1<=0)\{$

cout $<<$ "Try again!

A positive number please: $"$;

cin $>>$ value$1$;

$\}$

area $=$ PI $*$ value$1*$ value$1$;

cout $<<$ "Area $="<<$ area $<<$ endl;

break;

case $\text{'}$n$\text{'}$: case $\text{'}$N$\text{'}$: case $\text{'}$y$\text{'}$: case $\text{'}$Y$\text{'}$: $//$n$,$N$,$y$,$Y are valid input

break;

default:

cout $<<$ "INVALID INPUT $-$ Try again!

$"$;

$\}$

$\}$ while $(($input $!=\text{'}$N$\text{'})$ && $($input $!=\text{'}$n$\text{'}))$;

cout $<<"$

$*****************************************$

$"$;

cout $<<"*$ KEEP CALM AND CODE ON AND BE SAFE! $*"$;

cout $<<"$

$*****************************************$

$"$;

return $0$;

$\}$