Compilare: main.cpp: In instantiation of 'int InputDevice::readUnsignedIntGeneral(I&, char) [with I = unsigned int]': main.cpp:70:81: required from 'int InputDevice::readUnsignedInt(I&, char) [with I = unsigned int]' main.cpp:83:41: required from 'bool InputDevice::readSignedInt(I&, char) [with I = int]' main.cpp:165:72: required from 'typename std::enable_if<(std::is_integral<_Tp>::value && std::is_signed<_Tp>::value), bool>::type InputDevice::read(I&) [with I = int; typename std::enable_if<(std::is_integral<_Tp>::value && std::is_signed<_Tp>::value), bool>::type = bool]' main.cpp:233:36: required from 'typename std::enable_if<((! is_iterator<T>::value) && (! std::is_convertible<T0, char*>::value)), bool>::type InputDevice::read(T0&&, T1&&, Ts&& ...) [with T0 = int&; T1 = int&; Ts = {}; typename std::enable_if<((! is_iterator<T>::value) && (! std::is_convertible<T0, char*>::value)), bool>::type = bool]' main.cpp:477:95: required from 'bool read(Ts&& ...) [with Ts = {int&, int&}]' main.cpp:483:11: required from here main.cpp:62:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (c >= base) break; ~~^~~~~~~ main.cpp: In function 'int main()': main.cpp:485:12: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized] writeln(a+b); ~^~ main.cpp:485:12: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]