Compilare: main.cpp: In member function 'longInt longInt::operator+(const longInt&)': main.cpp:41:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | while(l < digits.size() && r < oth.digits.size()) { | ~~^~~~~~~~~~~~~~~ main.cpp:41:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | while(l < digits.size() && r < oth.digits.size()) { | ~~^~~~~~~~~~~~~~~~~~~ main.cpp:46:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | while(l < digits.size()) | ~~^~~~~~~~~~~~~~~ main.cpp:49:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | while(r < oth.digits.size()) | ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'longInt longInt::operator*(const longInt&)': main.cpp:73:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 73 | for(int l = 0;l < digits.size();l++) { | ~~^~~~~~~~~~~~~~~ main.cpp:78:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 78 | for(int r = 0;r < oth.digits.size();r++) { | ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'longInt longInt::operator-(const longInt&)': main.cpp:107:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 107 | for(int r = 0;r < oth.digits.size();r++) { | ~~^~~~~~~~~~~~~~~~~~~ main.cpp:118:41: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 118 | for(int r = oth.digits.size();r < digits.size();r++) { | ~~^~~~~~~~~~~~~~~