3 dimensional figure volume

Here is the code for my program:
It is supposed to ask for 3 dimensions of a solid to find the volume of the figure.

Code:

---

//Description: This program asks for the 3 dimensions of a solid to calculate the volume of the figure.

#include <iostream>
#include <cmath>
#include <string>

int main()
{
  int menu;
  double cubeside;
  double basel;
  double sqph;
  double radi;
  double cylh;
  double radi2;
  double coneh;
  double radi3;
  double edge;
  double hexh;
  string response;

  do
  {

  cout << "\fWelcome to the Math Cheater 3000. All I need is for you
          to pick the 3D object and I will calculate the volume of it.
          Sounds pretty easy. Can you do it? Just try. The numbers
          corresponds with the 3D figure." << endl;

// Pick a number on the menu

  cout << "\n1. Cube \n2. Square Pyramid \n3. Cylinder \n4. Cone \n5. Sphere \n6. Hexagonal Prism" << endl;
  cout << "Pick a number: ";
  cin >> menu; 

// Puts up an error that they need to pick a number on the menu and to do it again.
 
  if(menu != 1 && menu != 2 && menu != 3 && menu != 4 && menu != 5 && menu != 6)
  {
  cout << "Pick a number on the menu: ";
  cin >> menu;
  }

// Each menu asks for the important formula points needed for the it to be solved.
 
  if(menu == 1)
  {
    cout << "Pick side length of choosen cube: ";
    cin >> cubeside;
    cout << "The volume of cube is: "<< pow(cubeside,3) << endl;
  }
  if(menu == 2)
  {
    cout << "Pick base length and height." << endl;
    cout << "Base length: ";
    cin >> basel;
    cout << "Height: ";
    cin >> sqph;
    cout << "The volume of square pyramid is: "<< (basel*basel)*(sqph)/3
        << endl;
  }
  if(menu == 3)
  {       
    cout << "Pick radius and height of cylinder." << endl;
    cout << "Radius: ";
    cin >> radi;
    cout << "Height: ";
    cin >> cylh;
    cout << "The volume of cylinder is: "<< (3.14 * pow(radi,2)) * cylh << endl;
  }
  if(menu == 4)
  {
    cout << "Pick radius and height of cone." << endl;
    cout << "Radius: ";
    cin >> radi2;
    cout << "Height: ";
    cin >> coneh;
    cout << "The volume of cone is: "<< (3.14 * pow(radi2,2)) * coneh << endl;
  }
  if(menu == 5)
  {
    cout << "Pick radius of sphere." << endl;
    cout << "Radius: ";
    cin >> radi3;
    cout << "The volume of sphere is: "<< (3.14 * pow(radi3,3)) * (4/3)<< endl;
  }
  if(menu == 6)
  {
    cout << "Pick edge length and height." << endl;
    cout << "Edge length: ";
    cin >> edge;
    cout << "Height: ";
    cin >> hexh;
    cout << "The volume of the hexagonal prism is: "<< (.5*(edge * 6))*((edge/2)*(1.732))*(hexh)
        << endl;
  }
 
// Asks if they want to do it again.

    cout << "Again?: ";
    cin >> response;
 

  } while (response == "y" || response == "Y");
 
  return 0;
}

---

Here is my error report:

Code:

---

1project.cpp:28:11: warning: missing terminating " character
1project.cpp:28: error: missing terminating " character
1project.cpp:29:23: error: invalid suffix "D" on integer constant
1project.cpp:31:25: error: invalid suffix "D" on integer constant
1project.cpp:31:35: warning: missing terminating " character
1project.cpp:31: error: missing terminating " character
1project.cpp: In function âint main()â:
1project.cpp:23: error: âstringâ was not declared in this scope
1project.cpp:23: error: expected `;' before âresponseâ
1project.cpp:28: error: âcoutâ was not declared in this scope
1project.cpp:29: error: âtoâ was not declared in this scope
1project.cpp:29: error: expected `;' before âpickâ
1project.cpp:37: error: âcinâ was not declared in this scope
1project.cpp:53: error: âendlâ was not declared in this scope
1project.cpp:57: error: âendlâ was not declared in this scope
1project.cpp:67: error: âendlâ was not declared in this scope
1project.cpp:76: error: âendlâ was not declared in this scope
1project.cpp:85: error: âendlâ was not declared in this scope
1project.cpp:92: error: âendlâ was not declared in this scope
1project.cpp:104: error: âresponseâ was not declared in this scope
1project.cpp:107: error: âresponseâ was not declared in this scope

---

It would be great if someone could help me out with my errors, and I am still trying to figure them out.
Thanks!

So you don't have such things as string, cout, cin, or endl. But there is std::string, std::cout, std::cin, and std::endl. (Perhaps you wanted a using declaration.)

Fix your string on line 11 first. In case you don't know, thats this one:

Code:

---

  cout << "\fWelcome to the Math Cheater 3000. All I need is for you
          to pick the 3D object and I will calculate the volume of it.
          Sounds pretty easy. Can you do it? Just try. The numbers
          corresponds with the 3D figure." << endl;

---

If you have a long line like that, you have to end EACH line with a ", the compiler doesn't like it when you put a newline in the middle of a string.

And in C and C++ it is perfectly valid to write a string as "abc" "def" - it is the same as "abcdef", and the space can be any number of any of the whitespace characters (space, newline, tab, form-feed (CTRL-L) [and probably some others]) that are acceptable elsewhere in a statement of C or C++.

--
Mats