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New to C++

 
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  #1
Dec 15th, 2008
I'm very new to C++

I have an assignment where I have to create a calculator. Should work in console window and should allow user to enter 1st then 2nd number and then operator user wishes... In addition I have to use a switch statement. Not only that but it should run inside a loop. I don't even know how to start a loop...

command to exit if the ‘?’.

I'm a little lost...
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Re: New to C++

 
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  #2
Dec 15th, 2008
So what is your question ??
What is a loop??

A loop is a group of statements that get called multiple times
e.g.

c++ Syntax (Toggle Plain Text) 
  1. for(int i=0;i<10;i++)
  2.    {
  3.        // statements here
  4.    }
which calls the statements 10 times
or
c++ Syntax (Toggle Plain Text) 
  1. while(x>18)
  2. {
  3.    // Statements here
  4. }

which calls the statements until x > 18. Note that if x is already
you don't get to run the statements in the loop.

There are other loop constructs, but for now: Write some code.

I would not try to do you assignment straight away, write a set of little test programs, e.g. print the number 1 to 10, then add them up.
then read a number from the keyboard etc. Post some code here, with a comment about what you can/can't understand and you will get a bit more useful feedback.

Note: We are not going to do you homework for you, but will help if you show effort.
Last edited by StuXYZ; Dec 15th, 2008 at 2:33 am.
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Re: New to C++

 
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  #3
Dec 15th, 2008
1. x as integer
2. y as integer
3. operator as char
4. get x from users
5. get y from users
6. get operator from users
7. switch operator, case '+': result=x+y , etc.
8. display result
9. while repeat, goto step 4
10. done.
.:-cikara21-:.
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Re: New to C++

 
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  #4
Dec 15th, 2008
C++ Syntax (Toggle Plain Text) 
  1.  int main()
  2. {
  3.   int x,y;
  4.   char opt; 
  5.   while(1)
  6.  {std::cout<<"please  input the x,y"<<endl;
  7.    std:: cin>>x>>y;    
  8.    std::cout<<"please  input the operate"<<endl;
  9.    std::cin>>opt;
  10.     switch (opt)
  11.     case '+' : return x+y;
  12.     case '-'   : return x-y;
  13.      .
  14.      .
  15.     ;
  16. }
  17. }
Last edited by AHUazhu; Dec 15th, 2008 at 4:57 am.
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Re: New to C++

 
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  #5
Dec 15th, 2008
You need a stack to implement calculator.
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Re: New to C++

 
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  #6
Dec 15th, 2008
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Originally Posted by ithelp View Post
You need a stack to implement calculator.
I don't think (s)he needs a stack for his/her question.
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Re: New to C++

 
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  #7
Dec 15th, 2008
Yea - this question is clearly a "hello world" type program - they are obviously not getting into stacks yet. You're just confusing the issue instead of adding something constructive...
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