What is the simplest way to convert array to vector?
void test(vector<int> _array)
{
...
}
int x[3]={1, 2, 3};
test(x); // Syntax error.
I want to convert x from int array to vector in simplest way.
Use the vector
constructor that takes two iterators, note that pointers are valid iterators, and use the implicit conversion from arrays to pointers:
int x[3] = {1, 2, 3};
std::vector<int> v(x, x + sizeof x / sizeof x[0]);
test(v);
or
test(std::vector<int>(x, x + sizeof x / sizeof x[0]));
where sizeof x / sizeof x[0]
is obviously 3
in this context; it's the generic way of getting the number of elements in an array. Note that x + sizeof x / sizeof x[0]
points one element beyond the last element.