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Array Size

Scheduled Pinned Locked Moved C / C++ / MFC
helpc++data-structures
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  • T TeVc

    Hi All I am new in vc++.I have a problem to get length of array.Plz help me

    T Offline
    T Offline
    ThatsAlok
    wrote on last edited by
    #3

    CArray or user defined array??

    "Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
    Never mind - my own stupidity is the source of every "problem" - Mixture

    cheers, Alok Gupta VC Forum Q&A :- I/IV Support CRY- Child Relief and You/xml>

    T 1 Reply Last reply
    0
    • M MANISH RASTOGI

      sizeof();

      T Offline
      T Offline
      TeVc
      wrote on last edited by
      #4

      Thanks for reply but it's not working i have a CString store[100];,CString File; and int cou=0;. And i use store[cou]=File. And i want to get Size of store[cou].Plz help me

      M 1 Reply Last reply
      0
      • T ThatsAlok

        CArray or user defined array??

        "Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
        Never mind - my own stupidity is the source of every "problem" - Mixture

        cheers, Alok Gupta VC Forum Q&A :- I/IV Support CRY- Child Relief and You/xml>

        T Offline
        T Offline
        TeVc
        wrote on last edited by
        #5

        User define Array

        L 1 Reply Last reply
        0
        • T TeVc

          User define Array

          L Offline
          L Offline
          Lost User
          wrote on last edited by
          #6

          do you want the size of the array in bytes, or the number of elements in the array? if you want the size in bytes, use the sizeof() like so;

          int size_in_bytes;
          int theArray[20];
          size_in_bytes = sizeof(theArray);

          S 1 Reply Last reply
          0
          • L Lost User

            do you want the size of the array in bytes, or the number of elements in the array? if you want the size in bytes, use the sizeof() like so;

            int size_in_bytes;
            int theArray[20];
            size_in_bytes = sizeof(theArray);

            S Offline
            S Offline
            santhoshv84
            wrote on last edited by
            #7

            Hi, Dont use user defined array in this case. You better use CStringArray. Then you no need to calculate the size of the array. This class is having a member function int GetSize() to get the size of the array.

            The price of anything is the amount of life you exchange for it. Thanks and Regards. SANTHOSH V

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            • T TeVc

              Hi All I am new in vc++.I have a problem to get length of array.Plz help me

              K Offline
              K Offline
              KarstenK
              wrote on last edited by
              #8

              please read at first the docs about the used obejcts carefully. Often there are tiny little helper as .length or .GetLength to solve such problems. (And use the search box in top of this site a lot) :-\

              Greetings from Germany

              1 Reply Last reply
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              • T TeVc

                Hi All I am new in vc++.I have a problem to get length of array.Plz help me

                CPalliniC Offline
                CPalliniC Offline
                CPallini
                wrote on last edited by
                #9

                What kind of array are you using? Could you please post array declaration? :)

                If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                [My articles]

                In testa che avete, signor di Ceprano?

                T 1 Reply Last reply
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                • CPalliniC CPallini

                  What kind of array are you using? Could you please post array declaration? :)

                  If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                  This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                  [My articles]

                  T Offline
                  T Offline
                  TeVc
                  wrote on last edited by
                  #10

                  CString store[100];,

                  CPalliniC 1 Reply Last reply
                  0
                  • T TeVc

                    CString store[100];,

                    CPalliniC Offline
                    CPalliniC Offline
                    CPallini
                    wrote on last edited by
                    #11

                    The size of such array is

                    int iSize = sizeof(store);

                    The number of elements of such array is

                    int iCount = sizeof(store)/sizeof(store[0]);

                    or, more concisely, 100. :)

                    If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                    This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                    [My articles]

                    In testa che avete, signor di Ceprano?

                    T 1 Reply Last reply
                    0
                    • CPalliniC CPallini

                      The size of such array is

                      int iSize = sizeof(store);

                      The number of elements of such array is

                      int iCount = sizeof(store)/sizeof(store[0]);

                      or, more concisely, 100. :)

                      If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                      This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                      [My articles]

                      T Offline
                      T Offline
                      TeVc
                      wrote on last edited by
                      #12

                      Thanks for reply but it's not working.

                      CString store[100];
                      CString File;
                      and int cou=0;
                      store[cou]=File.

                      File name added at the run time.Plz help me

                      CPalliniC 1 Reply Last reply
                      0
                      • T TeVc

                        Thanks for reply but it's not working.

                        CString store[100];
                        CString File;
                        and int cou=0;
                        store[cou]=File.

                        File name added at the run time.Plz help me

                        CPalliniC Offline
                        CPalliniC Offline
                        CPallini
                        wrote on last edited by
                        #13

                        What does it mean 'it's not working?' in such context? What are you trying to do? What happens instead? :)

                        If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                        This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                        [My articles]

                        In testa che avete, signor di Ceprano?

                        T 1 Reply Last reply
                        0
                        • CPalliniC CPallini

                          What does it mean 'it's not working?' in such context? What are you trying to do? What happens instead? :)

                          If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                          This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                          [My articles]

                          T Offline
                          T Offline
                          TeVc
                          wrote on last edited by
                          #14

                          store[cou]=File;

                          int iSize=sizeof(store);

                          AfxMessageBox(iSize);

                          Then i am geting Debug Assertion Fail Line number:163.

                          CPalliniC 1 Reply Last reply
                          0
                          • T TeVc

                            store[cou]=File;

                            int iSize=sizeof(store);

                            AfxMessageBox(iSize);

                            Then i am geting Debug Assertion Fail Line number:163.

                            CPalliniC Offline
                            CPalliniC Offline
                            CPallini
                            wrote on last edited by
                            #15

                            On what line does the code assert? BTW your array is fixed-sized to 100 elements, regardless if you assign or not any of them. :)

                            If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                            This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                            [My articles]

                            In testa che avete, signor di Ceprano?

                            T 1 Reply Last reply
                            0
                            • CPalliniC CPallini

                              On what line does the code assert? BTW your array is fixed-sized to 100 elements, regardless if you assign or not any of them. :)

                              If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                              This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                              [My articles]

                              T Offline
                              T Offline
                              TeVc
                              wrote on last edited by
                              #16

                              Thank Now it is working.Your code is good.I make a mistake.SO thanks again.Ome more question how can i use dynamic array.Plz help me

                              CPalliniC 1 Reply Last reply
                              0
                              • T TeVc

                                Thank Now it is working.Your code is good.I make a mistake.SO thanks again.Ome more question how can i use dynamic array.Plz help me

                                CPalliniC Offline
                                CPalliniC Offline
                                CPallini
                                wrote on last edited by
                                #17

                                If you need an array that grows dynamically then have a look at std::vector. MFC has the CArray container but it's a crap (please don't tell this to Rajesh :rolleyes: ). very basic (and naive) vector usage sample follows:

                                #include <iostream>
                                #include <string>
                                #include <vector>

                                using namespace std;
                                void main()
                                {

                                vector < string > v;

                                v.push_back(string("hi,"));
                                v.push_back(string("how"));
                                v.push_back(string("do you do?"));
                                cout << "vector size = " << v.size() << endl;
                                for (int i=0; i<v.size(); i++)
                                {
                                cout << v[i] << " ";
                                }
                                cout << endl;
                                }

                                :)

                                If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                                This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                                [My articles]

                                In testa che avete, signor di Ceprano?

                                T 1 Reply Last reply
                                0
                                • CPalliniC CPallini

                                  If you need an array that grows dynamically then have a look at std::vector. MFC has the CArray container but it's a crap (please don't tell this to Rajesh :rolleyes: ). very basic (and naive) vector usage sample follows:

                                  #include <iostream>
                                  #include <string>
                                  #include <vector>

                                  using namespace std;
                                  void main()
                                  {

                                  vector < string > v;

                                  v.push_back(string("hi,"));
                                  v.push_back(string("how"));
                                  v.push_back(string("do you do?"));
                                  cout << "vector size = " << v.size() << endl;
                                  for (int i=0; i<v.size(); i++)
                                  {
                                  cout << v[i] << " ";
                                  }
                                  cout << endl;
                                  }

                                  :)

                                  If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                                  This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                                  [My articles]

                                  T Offline
                                  T Offline
                                  TeVc
                                  wrote on last edited by
                                  #18

                                  Thanks for help.Every reply boost me..

                                  CPalliniC 1 Reply Last reply
                                  0
                                  • T TeVc

                                    Thanks for help.Every reply boost me..

                                    CPalliniC Offline
                                    CPalliniC Offline
                                    CPallini
                                    wrote on last edited by
                                    #19

                                    :)

                                    If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                                    This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                                    [My articles]

                                    In testa che avete, signor di Ceprano?

                                    1 Reply Last reply
                                    0
                                    • T TeVc

                                      Thanks for reply but it's not working i have a CString store[100];,CString File; and int cou=0;. And i use store[cou]=File. And i want to get Size of store[cou].Plz help me

                                      M Offline
                                      M Offline
                                      MANISH RASTOGI
                                      wrote on last edited by
                                      #20

                                      store[cou].GetLength()

                                      1 Reply Last reply
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