Re: [Dev-C++] 1D array

[Shawn <tre...@gm...>]

Thanks for the help everyone...I really appreciate this list!

Robert Alatalo wrote:
> Hello,
>
>       A couple of points... as was mentioned you need to figure out
> what you want months to be.  If you want it to be a simple array you
> can do as was suggested:
>
> char* months[] = { "January", "February", ... };
>
> or you could create a class called months which could be much more
> complicated, which depends upon what you are planning on doing next,
> so let me give you a couple of quick working solutions for you to play
> with.  Another thing to point out that it's rather bad form to use the
> same variable name for two nested loops.  It may actually work because
> the inner loop variable will hide the outer loop variable which isn't
> actually being used but hiding could make it more confusing if you
> actually did want to use the year loop for something in the future.
>
> Also, the << is used repeatably, it's a standard operator , think of
> it like += where you just keep taking on values at the end,
> so
>
> cout<<"Please enter the # of years.">>endl;
> should be
> cout<<"Please enter the # of years."<<endl;
>
> Another thing to point out, "using namespace std;" will bring
> everything from the std name space into the global name space and
> should be avoided beyond simple test cases, it's find for this but I
> am going to show you a more deliberate form:
>
> using std::cout
> using std::endl
>
> since that's what you're using..that way you won't being in something
> from std that you didn't intend.
>
> also, it's a small performance thing but a good habit to learn... use
> ++Variable rather than Variable++ if you don't need the old value for
> anything, otherwise the compiler does something like { int temp ; temp
> = value ; value += 1 ;  return temp }
>
> Also, arrays are Zero based in C/C++ so you need to go from 0 to 11 or
> create months like {"Dummy","January"....}
>
>
> I attached two samples of 'working' code, look if you want.... I know
> it can be annoying sometimes to get the syntax correct even when you
> know what you're doing, so hope they help.
>
> -Robert
>
>
>
>
> On Fri, Feb 29, 2008 at 5:12 PM, Shawn <tre...@gm...> wrote:
>   
>>  It's just going to be a list of the months that the code in the for loop
>> will iterate thru...string data.  When they enter one  for the outside loop
>> of the year, it will goto the inside loop and each time the loop asks for
>> the average rainfall, I want it to start for Jan, next prompt for Feb, taken
>> directly for the array I'm trying to initialize.
>>
>>  Thanks.
>>
>>
>>
>>  Per Westermark wrote:
>>  You must have missed something in your C++ book. Class of what type? And
>> if you try to get an array of January, February, ... - where is the
>> definition for January?
>>
>> char* months[] = { "January", "February", ... };
>>
>> In this case, months has a known data type - array of string pointers.
>> In this case, the array elements are not undefined variables, but of
>> directly specified string constants.
>>
>> /pwm
>>
>> On Fri, 29 Feb 2008, Shawn wrote:
>>
>>
>>
>>  I've never tried using arrays before in C++, just am familiar with using
>> them in python. I tried initializing the array as string months and
>> then {"January","February", ect} but the complier told me I needed to
>> set it up in constructor method. I looked that up in my book and came
>> up with this, but now I get the error that January isn't declared.
>>
>> My intention is to have it automatically advance to the next month in
>> the list by months[i] in the inner loop. Am I on the right track?
>>
>> Thanks!
>>
>> #include<iostream>
>> #include<iomanip>
>> using namespace std;
>>
>>
>>
>> int main()
>> {
>>
>> int years = 0;
>> int counter = 0;
>> int month = 0;
>> int average = 0;
>> *class months =
>> {January,February,March,April,May,June,July,August,September,October,November,December};*
>>
>>
>> months++
>> cout<<"Please enter the # of years.">>endl;
>>  for(i=years; i<=years; i++1)
>>
>> {
>>  for(i=12; i<=12; i++1)
>>  {cout<<"Please enter the rainfall for"<<months[i]<<;
>>  cin>>month
>>  sum = sum + month
>>  counter = counter + 1
>> }
>>
>> average = sum / counter
>>
>>
>> cout<<"The total number of months was "<<counter<<".";
>> cout<<"The total inches of rainfall was "<<sum<<".";
>> cout<<"The average rainfall was "<<average<<".";
>>
>>
>>
>>  return 0;
>> }
>>
>>
>>
>>
>>
>>
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