Can I assign safely an array to vector?

[Ram Laxman]

Hi all,
Can I assign an array to a vector if both(array and vector)
holds same data type?

[Jeff Schwab]

Ram Laxman wrote:

Hi all,
Can I assign an array to a vector if both(array and vector)
holds same data type?

Yes, but maybe not using the syntax you expect.
#include <vector>

int main( )
{
std::vector<int> vector;
int array[ ] = { 1, 2, 3 };

vector.assign( array, array + 3 );
}

[Jeff Schwab]

Ram Laxman wrote:

Hi all,
Can I assign an array to a vector if both(array and vector)
holds same data type?

Yes, but maybe not using the syntax you expect.
#include <vector>

int main( )
{
std::vector<int> vector;
int array[ ] = { 1, 2, 3 };

vector.assign( array, array + 3 );
}

[Thomas Tutone]

"Jeff Schwab" <je******@comcast.net> wrote:

Ram Laxman wrote:

Hi all,
Can I assign an array to a vector if both(array and vector)
holds same data type?

Yes, but maybe not using the syntax you expect.
#include <vector>

int main( )
{
std::vector<int> vector;
int array[ ] = { 1, 2, 3 };

vector.assign( array, array + 3 );
}

Or just:

#include <vector>

int main()
{
int array[] = { 1, 2, 3 };
std::vector<int> vec(array, array + sizeof(array));
}

Best regards,

Tom

[Kevin Goodsell]

Thomas Tutone wrote:

Or just:

#include <vector>

int main()
{
int array[] = { 1, 2, 3 };
std::vector<int> vec(array, array + sizeof(array));

This will probably not work correctly. You wanted the number of elements
in the array, not the number of bytes used to store the array.

int array[] = { 1, 2, 3 };
int size = sizeof array / sizeof *array;
std::vector<int> vec(array, array + size);

-Kevin
--
My email address is valid, but changes periodically.
To contact me please use the address from a recent posting.

[Jeff Schwab]

Thomas Tutone wrote:

"Jeff Schwab" <je******@comcast.net> wrote:

Ram Laxman wrote:

Hi all,
Can I assign an array to a vector if both(array and vector)
holds same data type?

Yes, but maybe not using the syntax you expect.
#include <vector>

int main( )
{
std::vector<int> vector;
int array[ ] = { 1, 2, 3 };

vector.assign( array, array + 3 );
}

Or just:

#include <vector>

int main()
{
int array[] = { 1, 2, 3 };
std::vector<int> vec(array, array + sizeof(array));
}

That's not assignment, it's initialization.

[Thomas Tutone]

"Kevin Goodsell" <us*********************@neverbox.com> wrote in message
news:9d*****************@newsread1.news.pas.earthl ink.net...

#include <vector>

int main()
{
int array[] = { 1, 2, 3 };
std::vector<int> vec(array, array + sizeof(array));

This will probably not work correctly. You wanted the number of elements
in the array, not the number of bytes used to store the array.

Oops. Absolutely right.

Best regards,

Tom