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suppose I have the following class: class MyInteger { private: int n_; public: MyInteger(int n) : n_(n) {}; // MORE STUFF }; And suppose this class don't have a default trivial constructor MyInteger() . I must always supply an int to initialize it for some reason. And then suppose that somewhere in my code I need a vector<MyInteger> . How do I initialize each MyInteger component in this vector<> ? I have two situations (probably the solution is the same, but I'll state them anyway), a normal variable inside a function: int main(){ vector<MyInteger> foo(10); //how do I initialize each //MyInteger field of this vector? doStuff(foo); } and as data in a class: class MyFunClass { private: vector<MyInteger> myVector; public: MyFunClass(int size, int myIntegerValue) : myVector(size) {}; // what do I put here if I need the // initialization to call MyInteger(myIntegerValue) for all // components of myVector? }; Is it possible to do it just in the initialization list or must I write the initialization by hand in the MyFunClass(int, int) constructor? This seems so very basic, and yet I somehow missed it inmy book and can't find in the web.

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