Default value for vector

[akmal4ik]

hi, i have problems with default value for vector wich type is

struct s
{
int a;
int b;
}

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

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

[maikel]

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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

[akmal4ik]

i do this another way, changed reference to pointer, and give pointer default value NULL, is it correct?

[jsmith]

That will work, but see

http://www.cplusplus.com/forum/articles/20193/