Unable to make this program

[masiht]

I am trying to make this program.I want it to ask the user if it he wants to quit the program or not.
Please tell me how can I do that




#include <iostream>
using namespace std;
int main()
{
double radius;
cout <<"please enter the radius =";
cin >>radius;
double side;
cout <<"please enter the side =";
cin>>side;
double area;
area=(side*side)-(2*3.1425*radius);
double diameter;
diameter=(2*radius);

if (diameter>side)
cout<<"radius is not in the range\n ";
else
cout<<"the area is = "<<area<<" inches"<<"\n";


while(true)
{
cout <<"please enter the radius =";

cout <<"please enter the side =";
int q;

cout"press Q to exit the program";
cin>>q;

if ( q=q )
break;

}



return 0;
}

[turke]

#include <iostream>
using namespace std;
int main()
{
double radius;
cout <<"please enter the radius =";
cin >>radius;
double side;
cout <<"please enter the side =";
cin>>side;
double area;
area=(side*side)-(2*3.1425*radius);
double diameter;
diameter=(2*radius);

if (diameter>side)
cout<<"radius is not in the range\n ";
else
cout<<"the area is = "<<area<<" inches"<<"\n";


while(true)
{
cout <<"please enter the radius =";

cout <<"please enter the side =";
char q;

cout << "press Q to exit the program";
cin>>q;

if ( q=='q')
break;

}



return 0;
}

here is it, you have had several mistakes...try using endl to make it prettier xP

[masiht]

@ turke Thanks turke !
I want this program to ask the user if enter c continue the program starts from
cout << "enter the radius value "
If the user enter q the program finishes without asking press any key to continue .


#include <iostream>
using namespace std;
int main()
{
double radius;
cout <<"please enter the radius =";
cin >>radius;
double side;
cout <<"please enter the side =";
cin>>side;
double area;
area=(side*side)-(2*3.1425*radius);
double diameter;
diameter=(2*radius);

if (diameter>side)
cout<<"radius is not in the range\n ";
else
cout<<"the area is = "<<area<<" inches"<<"\n";


while(true)
{

char q;

cout << "Enter Q to exit the program or Enter C to continue";
cin>>q;

if ( q=='q')
break;

}



return 0;
}

[turke]

I hope you meant this =P

#include <iostream>
using namespace std;
int main()
{
double radius;
loop:cout <<"please enter the radius =";
cin >>radius;
double side;
cout <<"please enter the side =";
cin>>side;
double area;
area=(side*side)-(2*3.1425*radius);
double diameter;
diameter=(2*radius);

if (diameter>side)
cout<<"radius is not in the range\n ";
else
cout<<"the area is = "<<area<<" inches"<<"\n";


while(true)
{

char q;

cout << "Enter Q to exit the program or Enter C to continue";
cin>>q;

if ( q=='q')
break;
else if (q=='c')
{
     goto loop;
     break;
     }
}



return 0;
}

[masiht]

Can you make the same program instead of using goto loop I mean by using while , do while , or for loop instead of goto loop ?

[Zaita]

@masiht: This isn't a homework service. Turke has provided you with ample information to complete the task on your own.

[turke]

Oh sry, I didn't know I can't post solved problem...
My bad =P

[masiht]

This is not my home question.
they are much harder and complex than this.
I was just confused in the looping.
@ turke , Thanks to you turke .your solved program helped me in understanding alot of other things.

[turke]

if you wanna while loop you must make it like this...

#include <cstdlib>
#include <iostream>

using namespace std;

int main()
{
  int n;
  while (n!=0) {
    cout << "Enter number (0 to end): ";
    cin >> n;
    cout << "You entered: " << n << "\n";
     }
    system("PAUSE");
    return 0;
}

[masiht]

I am not able to compare this with what I want to do .

[hannad]

You just have to copy it on your program. It's not really hard to do!!

[masiht]

I want to make a program that asks enter Q to quit or enter C to continue the program using while or do while

[Zaita]

If your having significant issues with this. Perhaps you should try reading some of the tutorials on this site instead of asking for pieces of code.
http://www.cplusplus.com/doc/tutorial/

If this is significantly important. I suggest you try somewhere like www.rentacoder.com where you can hire a programmer to complete your task.

[turke]

Well basicly when you enter while(something) it will loop for as long as something doesn't return false...When loop finds that (something) == false it will break. So in the upper code it will run as long as you don't enter 0

[tcbaby]

Thanks guys.