Compilare: main.cpp: In function 'int numar()': main.cpp:18:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | while (i<s.size ()&&s[i]>='0'&&s[i]<='9') | ~^~~~~~~~~~ main.cpp: In function 'void expresie(std::bitset<8000>&)': main.cpp:29:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | while ((i<s.size ())&&(s[i]=='+'||s[i]=='-'||s[i]=='*'||s[i]=='%')) | ~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:73:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 73 | for (i=0; i<s.size (); i++) | ~^~~~~~~~~~ main.cpp:91:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 91 | for (i=0; i<s.size (); i++) | ~^~~~~~~~~~