Default value for vector

akmal4ik (59)
hi, i have problems with default value for vector wich type is

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struct s
{
int a;
int b;
}

void somefunction(int a, vector<s> & myVector = ??? );


what i must use instead of ???
thanks for help!

maikel (170)
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#include <vector>
#include <iostream>
using namespace std;

void printvector(const vector<int>& v = vector<int>())
{
    vector<int>::const_iterator it;
    cout << "vector content: ";
    for (it = v.begin(); it != v.end(); it++)
        cout << *it;
    cout << endl;
}

int main()
{
    vector<int> v;
    for (int i = 0; i < 10; i++)
        v.push_back(i);
    printvector();
    printvector(v);
}

vector content:
vector content: 0123456789


int c++0x there will be better options like:

 
 
    vector<int> v = {1,2,3,4,5};


and therefore

 
 
void somefunction(int a, const vector<int>& v = {1,2,3,4});


if you use the newest version of g++ or vs they support this maybe. But not sure, you can look it up in the net. Its still no standard, so not recommendable, but good to know.

Maikel
Last edited on
akmal4ik (59)
i do this another way, changed reference to pointer, and give pointer default value NULL, is it correct?
jsmith (5804)
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