#include <iostream>
#include <conio.h>
#include <vector>
using namespace std;
int main()
{
vector <int> num( 25, 50, 75 );
cout << num.at(0) << endl;
cout << num.at(1) << endl;
cout << num.at(2) << endl;
getch();
return 0;
}
Vector Problem
Author
I just created this program using vectors, as a little refresher, and I can't seem to get it to work
I get the error:
no matching function for call to 'std::vector<int::allocator<int> > vector(int,int,int)'
You can't specify the contents of the vector in the constructor. One fairly common way to work around this is to construct from an array:
Σnigma
#include <iostream>#include <vector>using namespace std;// a handy pair of templates for getting pointers to the// first and one-past-the-end elements of a stack arraytemplate < typename Type, std::size_t n >Type const * begin(Type (&array)[n]){ return array;}template < typename Type, std::size_t n >Type const * end(Type (&array)[n]){ return array + n;}int main(){ int num_data[] = {25, 50, 75}; // use iterator range to construct vector vector <int> num(begin(num_data), end(num_data)); cout << num.at(0) << endl; cout << num.at(1) << endl; cout << num.at(2) << endl;}Σnigma
Not a comment providing a solution, but it might be worth knowing that in a few years, you might be able to initialize vectors and other containers just like arrays. (Google: "C++0x initializer lists")
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