c++ overload constructor with int and char*

Question

I try to overload constructor with int and char *. Then there is ambiguity in call with 0. Is there any workaround/solution for this?

CBigInt (unsigned int);
CBigInt (const char *);

The problem is on the line with 0:

CBigInt a;
// some more code
 a *= 0; 

Thanks for answering.

Answer 1

Make one of the constructors explicit. It will then only be used when passed type exactly matches.

CBigInt (unsigned int);
explicit CBigInt (const char *);

Answer 2

You could use the "explicit" keyword:

explicit CBigInt(const char *);

Using this, you must explicitly cast the argument to a const char *, otherwise CBigInt(unsigned) will be executed.