Hey there people. Im sure its a silly mistake but i cant get my while to work.

sorry to dump a large code in your faces

tell me off if you need to

Code:

#include <iostream.h>
float FindVolume(int diameter,int length)
{
float pi = 3.14159265358979323846;
float circumference = pi*diameter;
float volume = circumference*length;
return volume;
}
int SquareThisNumber(int number)
{
int SquaredNumber = number*number;
return SquaredNumber;
}
int main()
{
int diameter;
int length;
int number;
int choice;
int exit = 0;
while(exit==0); //Should loop because exit is specified as 0 above.
//exit can only be changed by user input at end of program.
{
std::cout << "Choose what you want to do from the list below and enter the number" << std::endl;
std::cout << "1)Square a Number" << std::endl;
std::cout << "2)Find the Diameter of a Cylinder" << std::endl;
std::cin >> choice;
if(choice==1)
{
std::cout << "Please enter a number. I would love to square it." << std::endl;
std::cin >> number;
std::cout << number << " squared is: " << SquareThisNumber(number) << std::endl;
}
else if(choice==2)
{
std::cout << "Type the diameter of a cylinder" << std::endl;
std::cin >> diameter;
std::cout << "Type the length of a cylinder" << std::endl;
std::cin >> length;
std::cout << "Diameter: " << diameter << "cm" << std::endl;
std::cout << "Length: " << length << "cm" << std::endl;
std::cout << "The volume is " << FindVolume(diameter,length) << "cm3" << std::endl;
}
else
{
std::cout << "WTF! enter a number from the list above! foolish...";
}
std::cout << "What would you like to do?" << std::endl;
std::cout << "0)Back to menu" << std::endl;
std::cout << "1)Exit Program" << std::endl;
std::cin >> exit;
}
return 0;
}

Thanks for taking the time to click my post