Thread: problem with Pointers and array

Hi,
I'm trying to write a simple program to learn and use array and pointer. It copies values from a vector to an array and prints the value of the array. Here is the portion of the code that causes problem:

Code:

    int *pArr = new int[vect.size()] ;
    int *pArrBegin = pArr ;
    for ( vector<int>::iterator itr = vect.begin() ; itr != vect.end() ; itr++ ) {
        int *pItr = pArr;
        *pItr =  * itr ;
        pItr++ ;
    }

    cout << "Print Array: " << endl ;
    for ( int *pArrItr = pArrBegin  , *pArrEnd = pArr + vect.size(); pArrItr != pArrEnd; pArrItr++ ){
        cout << * pArrItr << " " ;
    }

Here is the output:

Code:

 
 ./copyVectorToArray 
1 2 3 4 
Print vec: 
1 2 3 4 
Print Array: 
4 0 0 0

I just don't understand why when I increment pltr, pArr and pArrBegin is also incremented.