Is there an Ipv4 validation function in C++?

Question

C++ / C#

if not, then tell me how to implement it in a minimum of lines. just a very huge code comes out

Answer 1

What's the point of validating it? Here your program will accept only 4 decimal numbers from 0 to 255 separated by a dot, while most of the software normally digests octal with hexadecimal numbers. And even 0x7f000001 is recognized as a normal address. All these programs use the inet_aton function implemented in each OS. But this is pure C, not C++.