#include

using namespace std;

float c$\_$f$($float$)$;

float f$\_$c$($float$)$;

main$()$

$\{$

while$(1)$

$\{$

int ch;

float temp;

cout $<<"***$Temparature Conversion Program$***"<<$ endl;

cout $<<"$

$1.$ Celsius to Fahrenheit

$2.$ Fahrenheit to Celsius

$3.$ Exit" $<<$ endl;

cout $<<"$

Enter you choice: $"$;

cin $>>$ ch;

if$($ch$==1)$

$\{$

cout $<<"$

$**$Celsius to Fahrenheit$**"<<$ endl;

cout $<<$ "Enter temparature in Celsius: $"$;

cin $>>$ temp;

if$($temp$>=0)$

cout $<<$ "Temparature in Fahrenheit: $"<<$ c$\_$f$($temp$)<<$ endl $<<$ endl;

else

cout $<<$ "Try with a positive number.";

$\}$

else if$($ch$==2)$

$\{$

cout $<<"$

$**$Fahrenheit to Celsius$**"<<$ endl;

cout $<<$ "Enter temprature in Fahrenheit: $"$;

cin $>>$ temp;

if$($temp$>=0)$

cout $<<$ "Temprature in Celsius: $"<<$ f$\_$c$($temp$)<<$ endl $<<$ endl;

else

cout $<<$ "Try with a positive number.";

$\}$

else if$($ch$==3)$

$\{$

cout $<<"$

$**$Thank you for using this program" $<<$ endl;

exit$(0)$;

$\}$

else

$\{$

cout$<<$"Invalid Choice";

$\}$

$\}$

$\}$

float c$\_$f$($float celsius$)$

$\{$

float fahrenheit $=($celsius$*9\mathrm{.}0)/5\mathrm{.}0+32$;

return fahrenheit;

$\}$

float f$\_$c$($float fahrenheit$)$

$\{$

float celsius $=5\mathrm{.}0*($fahrenheit$-32)/9\mathrm{.}0$;

return celsius;

$\}$