C / C++ / MFC

31-Jan-06 8:07

Because I want the following code(it's a part from a long one) search or check a required qau., is it avaliable in the array,I did it by the if/else statement ,and it runs,but I want it to be done by another select or conditional one,for example by(switch or )(if /else if )or another one.
Please answer it, because I did my try with( switch/case) but I failed to run it .

cout<<"\nEnter the Required_Qauntity:\n";
cin>>Required_Quantity;
if(Required_Quantity > x[index][1] || Required_Quantity <=0)
{cout<<"\nThe avaliable Quantity in the store is "<

Maximilien30-Jan-06 6:02

Maximilien

30-Jan-06 6:02

select ? like in if and switch ?

if are best used for simple boolean decisions ( true, false ), and will become useless when you start using else if statements.

switch are best used for multiple decisions ( like making a decision that has many answers ).

There are some other types of select, I think lookup tables is one of them, usefull for fast access, but I'm not really familiar with it.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Deema Jack31-Jan-06 2:28

31-Jan-06 2:28

cout<<"\nEnter the Required_Qauntity:\n";<br />
cin>>Required_Quantity;<br />
if(Required_Quantity > x[index][1] || Required_Quantity <=0) <br />
{cout<<"\nThe avaliable Quantity in the store is "<<x[index][1]<<" part(s). Please ,enter a suitable quantity.\n";<br />
Goto f;<br />
}<br />
else <br />
cout<<"\nThe Required_Quantity is available in the store.\n";

Is there another way to make the same seach , and which one is the best to use it?
with thanks.
deema

-- modified at 8:34 Tuesday 31st January, 2006

Prakash Nadar31-Jan-06 4:45

Prakash Nadar

31-Jan-06 4:45

deema,
what is that you want to do, I figured that you want to check a quantity against a item's available quantity,

What exactly are you stuck up with ?

Deema Jack31-Jan-06 8:05

31-Jan-06 8:05

I want the following code(it's a part from a long one) search or check a required qau., is it avaliable in the array,I did it by the if statement ,and it runs,but I want it to be done by another select or conditional one,for example by(switch or )(if /else )or another one.
Please answer it, because I did my try with( switch/case) but I failed to run it .

cout<<"\nEnter the Required_Qauntity:\n";<br />
cin>>Required_Quantity;<br />
if(Required_Quantity > x[index][1] || Required_Quantity <=0) <br />
{cout<<"\nThe avaliable Quantity in the store is "<<x[index][1]<<" part(s). Please ,enter a suitable quantity.\n";<br />
Goto f;<br />
}<br />
else <br />
cout<<"\nThe Required_Quantity is available in the store.\n";

Prakash Nadar30-Jan-06 6:04

Prakash Nadar

30-Jan-06 6:04

use if(...) for validating multiple conditions,

There is no such thing as select in c++ , yeah there is switch statement.

-Prakash

Re: thanks but ..

Deema Jack31-Jan-06 2:30

The Best Conditional statement ..

31-Jan-06 2:30

Thanks, TOXCCT , Maximilien Lincourt, Prakash, VuNic, codito ergo sum ,for your considerable replays, what I mean is ,if I’ve a c++ program to search for a required quantity in a store I did it by if /else statement:

cout<<"\nEnter the Required_Qauntity:\n";
cin>>Required_Quantity;
if(Required_Quantity > x[index][1] || Required_Quantity <=0)
{cout<<"\nThe avaliable Quantity in the store is "<

Eytukan30-Jan-06 6:48

Eytukan

30-Jan-06 6:48

you mean this? for multiple condtions, switch case is best.
it gives more readability.

VuNic

toxcct30-Jan-06 6:55

toxcct

30-Jan-06 6:55

but you have to take not that the switch() works only for integer types...

never do this :

char* pszString = "Hello...";
 
switch (pszString) {
  case "Hello":
    //...
    break;
 
  case "World":
    //...
    break;
 
  default:
    //...
}

this is bad !!!!!!

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VCalc 3.0 soon...]

Eytukan30-Jan-06 7:14

Eytukan

30-Jan-06 7:14

yeaa tox , that's really bad about it Sigh | :sigh:

VuNic

BadKarma30-Jan-06 9:50

BadKarma

30-Jan-06 9:50

you can use strings in a switch
when the text is limited to 4 char

thats how the ftp, telnet and email server work,
they all use 4 letter commands to work

char szCmd[80];
unsigned long* pulCmd = &szCmd;

switch(*pulCmd)
{
case 0x706c6568: // "help"
 Help();
 break;
case 0x74697571: // "quit"
 Quit();
 break;
case 0x6e65706f: // "open"
 Open();
 break;
}

codito ergo sum