I wanted to share with you some of the concepts I have learned from C++ 11. One of the new features in C++ 11 is the automatic type deduction: auto. With auto you can declare a variable or an object without specifying its type.
auto i=12; //i is of type int auto f=4.2; //f is of type float
How does auto knows what is the type of a variable? auto deduces the type from its initializer. Therefore, an initializer is required. The following example will produce an error:
auto i; // ERROR, it can't deduce its type
You can add additional qualifiers if you want such as:
static auto i=12;
Using auto is quite nice. You can use it when the type is complicated or pretty long. You just let the compiler deduce the type. For example:
vector<string> v; //... auto pos=v.begin(); //pos has type vector<string>::iterator
Use auto whenever you can, just make sure to provide an initializer so auto knows how to deduce the type.