string to int
{
_ACRTIMP char* __cdecl itoa(
_In_ int _Value,
_Pre_notnull_ _Post_z_ char* _Buffer,
_In_ int _Radix
);
}
int to stirng
{
_Check_return_ _CRT_JIT_INTRINSIC _ACRTIMP int __cdecl atoi (_In_z_ char const* _String);
}