Need help in coding.

[Ccoder]

I'm a beginner in coding in C++. I just came to ask on how to loop your program.
Like for e.g, in my practice program.

using namespace std;

int main()
{
    cout << "One = Yes Two = No \n";
   float num1;
   float num2;
  int number;
  
   num1 = 1;
   num2 = 2;
   
   
   
   cout << "\n Yes or No?\n"<< endl;
   cin >> number;
   
 
   if (number == 1)
   {
            cout << "You have chosen 1.\n "<< endl;
            cout << " Restart program? \n Yes or No?";
            cin >> number;
            if(number==1)
            {
              //           
                         
            }
            else
            {
                // Just testing this.
                system("PLAY")
            }
            
   }
   else
   {
       if(number == 2)
       {
                 cout << "You have chosen 2. \n"<< endl;
       }
       else
       {
           cout << "You didn't follow the proper instructions.\n"<< endl;
           
       }
   }
   
 

   

    
    
    
    
    system("PAUSE");
    return 0;
}

I want the program to loop, right here.

cout << "You have chosen 1.\n "<< endl;
            cout << " Restart program? \n Yes or No?";
            cin >> number;
            if(number==1)
            {
              //           
                         
            }
            else
            {
                // Just testing this.
                system("PLAY")
            }

and right here, i want to be able to press 2 and have the program close.

else
            {
                // Just testing this.
                system("PLAY")
            }

 

[Ken g6]

cout << " Is this homework? \n Yes or No?";

We won't do your homework for you, but I'll just leave this here:

http://www.cplusplus.com/doc/tutorial/control/

 

[Jaydip]

This seems completely out of place, why is that?

 

[Fayd]

you could use a legitimate while loop.... or just use a label and goto. i hope you use the latter.

 

[spamhunter]

you could use a legitimate while loop.... or just use a label and goto. i hope you use the latter.

Dude, a label and a goto? I think you're going to hell.

 

[piasabird]

This is the first thing you learn in programming. If you have a book I am sure there is an example for programming loops in the book!!!! i.e. get book Learning C++ in 24 hours or similar. Looks like homework.

 

[Fayd]

Dude, a label and a goto? I think you're going to hell.

it's not how i'd do it. it's how i hope he does it.

 

[you2]

do {
cout <<"Why am I doing this?\n";
} while (true);
while(true) {
cout <<"Why do i not see this line?";
}
exit(0);

 

[Pia]

use a label and goto

I don't want to be overly critical, but that's more of a C thing, isn't it?

Since Ccoder is coding C++, he should do it properly. With the new C++11 features and the C++ standard library you can do really beautiful loops (this requires a pretty up-to-date compiler, though):

#include <iostream>
#include <list>

void main() {
// we want to loop at least once, thus '1'
list<char> loop{'1'};
// if we want to keep looping more, just use this
// to extend the loop by '1' again!
auto again = [&]{loop.push_back('1');};
// keep looping 'auto' matically until loop is over
for (auto c : loop) {
  cout << "1 to loop, something else to exit" << endl;
  cin >> c; if (c == '1') again();
}
}

C++ :wub:

 

[Tweak155]

I don't want to be overly critical, but that's more of a C thing, isn't it?

Since Ccoder is coding C++, he should do it properly. With the new C++11 features and the C++ standard library you can do really beautiful loops (this requires a pretty up-to-date compiler, though):

#include <iostream>
#include <list>

void main() {
// we want to loop at least once, thus '1'
list<char> loop{'1'};
// if we want to keep looping more, just use this
// to extend the loop by '1' again!
auto again = [&]{loop.push_back('1');};
// keep looping 'auto' matically until loop is over
for (auto c : loop) {
  cout << "1 to loop, something else to exit" << endl;
  cin >> c; if (c == '1') again();
}
}

C++ :wub:

I'm gonna get frustrated for Fayd here. You realize he was being sarcastic, right? It's not apparent in your post if so.

 

[Pia]

I'm gonna get frustrated for Fayd here. You realize he was being sarcastic, right? It's not apparent in your post if so.

Please read my code. I'm sure its beauty will dispel all your uncertainty.

 

[Tweak155]

Please read my code. I'm sure its beauty will dispel all your uncertainty.

You nailed my ignorance directly, I should have read your code :biggrin:

 

[OSULugan]

I'd recommend recursion.

 

[Elixer]

Hmmm...nothing like inline assembly for C/C++!

asm{
mov ax, this->vars
loopy:
...*
dec ax
cmp ax, 0
je exit
jmp loopy
exit:
}

* you need to add your own code to do what you want...you only asked for loop control...

On a more serious note, what is the reason people post these types of call for help when the answer is easily found using whatever search engine, or any good tutorial on said language ?

 

[Fayd]

You nailed my ignorance directly, I should have read your code :biggrin:

i'm missing the joke as the extent of my C++ knowledge is now 10 years old, and 2 semesters of D+ work at that.

But I'm sure it's good

 

[Leros]

On a more serious note, what is the reason people post these types of call for help when the answer is easily found using whatever search engine, or any good tutorial on said language ?

It can be kinda hard to look for things on Google when you have zero knowledge about the topic. You don't really know what queries to use to find what you want and you have a hard time evaluating whether a certain result is crap or not.

 

[Markbnj]

On a more serious note, what is the reason people post these types of call for help when the answer is easily found using whatever search engine, or any good tutorial on said language ?

I've often had the same thought. Perhaps people simply prefer to interact with other people, as opposed to a search engine. Then again, even simple questions tend to spawn discussion here, and other ideas sometimes come from that.

 

[Obsoleet]

Search for 'C++ while loop'.

 

[cytg111]

Dude, a label and a goto? I think you're going to hell.

I liked it. HACKS UNITED!!!2!

 

[cytg111]

Hmmm...nothing like inline assembly for C/C++!

asm{
mov ax, this->vars
loopy:
...*
dec ax
cmp ax, 0
je exit
jmp loopy
exit:
}

* you need to add your own code to do what you want...you only asked for loop control...

On a more serious note, what is the reason people post these types of call for help when the answer is easily found using whatever search engine, or any good tutorial on said language ?

I would totally do that just to get on my professors/teachers nerve .. i can easily imagine the one eye-twitch on his face reading something like that.. heeeeh

on a serious note, industry standard mandates that you form a while loop like this ;
while(!!(!true!=!false))
{
.. your stuff
}

 

[Chaotic42]

Hmmm...nothing like inline assembly for C/C++!

asm{
mov ax, this->vars
loopy:
...*
dec ax
cmp ax, 0
je exit
jmp loopy
exit:
}

* you need to add your own code to do what you want...you only asked for loop control...

On a more serious note, what is the reason people post these types of call for help when the answer is easily found using whatever search engine, or any good tutorial on said language ?

Why not just use ecx and loop?

 

[exdeath]

Why not just use ecx and loop?

Micro ops.

I've never seen a good compiler use loop. Most of the CISC type instructions are pretty terrible and only exist for backward compatibility.