Array Size

TeVc

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

MANISH RASTOGI

sizeof();

ThatsAlok

CArray or user defined array??

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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

TeVc

User define Array

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);

santhoshv84

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.

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KarstenK

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) :-\

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CPallini

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

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TeVc

CString store[100];,

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]

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

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]

TeVc

store[cou]=File;

int iSize=sizeof(store);

AfxMessageBox(iSize);

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

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]

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

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]

TeVc

Thanks for help.Every reply boost me..

CPallini

:)

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]

MANISH RASTOGI

store[cou].GetLength()