Function Taking Generic Vector?

[gvanto]

I was wondering if there's a way to take a vector of any type into the argument of a function somehow? So instead of: showVectorSizeAndContents ( vector v ) it can be of any type, not just int? Thanks alot gvanto [CODE] /* * 4_VectorDemo2_InsertDelete.cpp * * Created on: 2/02/2009 * Author: pacific */ //Vector basics: #include #include using namespace std; void showVectorSizeAndContents(vector v) { // here i'd like a vector of any type to be passed ...? unsigned int i = 0; cout << "Current contents:\n"; cout << "Size = " << v.size() << endl; // display contents of vector for(i=0; i<v.size();> cout << v[i] << " "; } cout << endl; cout << endl; return; } int main() { vector v; unsigned int i; for(i = 0; i < 10; i++) { v.push_back('A' + i); } //cant call the show method since it takes vector } [/CODE]

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[Naveen]

gvanto wrote:

I was wondering if there's a way to take a vector of any type into the argument of a function somehow?

Pass the vector as reference or pointer. Check the prototype of showVectorSizeAndContents as follows. void showVectorSizeAndContents(vector**&** v) Read Stephen's answer.

nave [OpenedFileFinder] [My Blog]

modified on Monday, February 2, 2009 1:21 AM

[Nishad S]

Naveen wrote:

void showVectorSizeAndContents(vector& v)

Wrong. vector is a template.

- ns ami -

[Stephen Hewitt]

I assume you mean std::vector. If so then try something like this:

template <typename T>
inline void SomeFunction(std::vector<T> &vec)
{
// Do stuff here.
}

Steve

[Naveen]

ns ami wrote:

Wrong. vector is a template.

:doh: I forgot. Corrected now :) Thanks for pointing

nave [OpenedFileFinder] [My Blog]

[Nishad S]

You may need to derive from vector for flexibility. And can write the code for "showVectorSizeAndContents" inside that.

- ns ami -

[gvanto]

Awesome this works just as intended !!!!!!! Many thanks Stephen! :-D

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[gvanto]

I am trying to do the same for a list, but cant get the iterator pointer to use the generic type T: template inline void showListSizeAndContents(list lst) { //generic list cout << "Size = " << lst.size() << endl; cout << "List Contents: "; list::iterator p = lst.begin(); //this gives error! while(p != lst.end()) { cout << *p; p++; } return; }

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[Stephen Hewitt]

Your post is malformed. For example, I can't see and angle brackets after the template keyword. I'll have a go anyway but please revise your posts and make sure they are readable. Try something like this:

template <typename T>
inline void showListSizeAndContents(const list<T> &lst)
{
cout << "Size = " << lst.size() << endl;
 
cout << "List Contents: ";
 
list<T>::const_iterator e = lst.end();
for (list<T>::const_iterator i=lst.begin(); i!=e; ++i)
{
cout << *i << " ";
}
 
cout << endl;
}

Steve

[gvanto]

Thanks Steve that works perfectly!! gvanto

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