style cast" in g++

Possible Duplicate:
When should static_cast, dynamic_cast and reinterpret_cast be used?

With this C++ code,

char* a = (char*) b;

I got warning warning: use of old-style cast .

What would be the new-style cast?

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reinterpret_cast , static_cast , dynamic_cast and const_cast are the c++ cast alternatives.

const_cast to remove const/volatile from a const variable.

dynamic_cast to perform runtime validity checks when casting in between polymorphic types

static_cast to perform eg up/down-cast in a inheritance hierarchy, but with no runtime checks, or to explicitly perform conversions that could be implicit (eg float to int)

reinterpret_cast to convert in between unrelated types.

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Read this topic to know about C++ style casts which come in various flavors:

When should static_cast, dynamic_cast, const_cast and reinterpret_cast be used?

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