C++ vector > reserve size at beginning

Question

in c++ I have

vector > table;

How can I resize vector so that it has 3 rows and 4 columns, all zeros?

Someth

Answer 1

You can pass an explicit default value to the constructor:

vector example(100, "example");  
vector> table (3, vector(4));
vector>> notveryreadable (3, vector>(4, vector (5, 999)));

The last one is more readable if it's built "piecewise":

vector dimension1(5, 999);
vector> dimension2(4, dimension1);
vector>> dimension3(3, dimension2);

particularly if you use explicit std:: - code that looks like

std::vector>> lol(3, std::vector>(4, std::vector (5, "lol")));

should be reserved for bad jokes.