Compilare: main.cpp: In member function 'myclass::bigInt myclass::bigInt::operator+(const myclass::bigInt&) const': main.cpp:33:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | while(index < oth.digits.size() && index < digits.size()) { | ~~~~~~^~~~~~~~~~~~~~~~~~~ main.cpp:33:54: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | while(index < oth.digits.size() && index < digits.size()) { | ~~~~~~^~~~~~~~~~~~~~~ main.cpp:38:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | while(index < oth.digits.size()) { | ~~~~~~^~~~~~~~~~~~~~~~~~~ main.cpp:43:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | while(index < digits.size()) { | ~~~~~~^~~~~~~~~~~~~~~