help with vector..

This is a discussion on help with vector.. within the C++ Programming forums, part of the General Programming Boards category; Code: #include <iostream> #include <vector> #include <windows.h> using namespace std; using std::vector; int main() { vector<int> vi; for (int i ...

  1. #1
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    help with vector..

    Code:
    #include <iostream>
    #include <vector>
    #include <windows.h>
    
    using namespace std;
    using std::vector;
    int main()
    {
          vector<int> vi;
          for (int i = 0; i < 100; i++)
          {
          Sleep(5000);
          vi.push_back(i);
          
          cout< <<endl; //heres the prob , i want to cout vi[0] then vi[1]
          Sleep(5000);      //as the for loop assigns values to the vector 
          }
    return 0;
    }

  2. #2
    carry on JaWiB's Avatar
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    So you want this?
    Code:
    std::cout<<vi[i]<<std::endl;
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  3. #3
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    >> i want to cout vi[0] then vi[1]

    What is the problem? Other than the first time through the loop when vi[1] is invalid, you can do that if you want. It doesn't seem to make a lot of sense, though, maybe you could describe better what you are trying to do.

  4. #4
    Slave MadCow257's Avatar
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    ?
    Code:
    #include <iostream>
    #include <vector>
    #include <windows.h>
    using namespace std;
    
    int main()
    {
    	vector<int> vi;
    	for (int i = 0; i < 100; i++)
    	{
    	//	Sleep(5000);
    		vi.push_back(i);
    	}
    	cout << vi[0] << vi[1];
    }

  5. #5
    and the hat of wrongness Salem's Avatar
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    > cout< <<endl;
    Three < ?
    Where's the variable you want to output?
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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  6. #6
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    thanks for the quick replys ...
    i was doing vi[0][i] so it would start from 0 element
    the whole idea was i didnt know how to cout in order as the for loop assigns
    Last edited by Anddos; 03-18-2006 at 12:36 PM.

  7. #7
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    You could also use vi.at(i) instead of vi[i]

    The added bonus with at() is that it will range-check for you, in case somewhere along the line your program doesn't manage to fill the element you are trying to retrieve. (it will throw an error - But that is far better than the undefined behaviour you would otherwise get)

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