Borderou de evaluare (job #794604)

Eroare de compilare: main.cpp: In function 'int main()': main.cpp:11:25: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} and 'int' [-Wsign-compare] 11 | while (s.size() < n) s += ' '; | ~~~~~~~~~^~~ main.cpp:12:22: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} and 'int' [-Wsign-compare] 12 | if (s.size() > n) s = s.substr(0, n); | ~~~~~~~~~^~~ main.cpp:13:44: error: no match for 'operator!' (operand type is 'std::string' {aka 'std::__cxx11::basic_string<char>'}) 13 | while(s.find(' ',0)<=s.size()-1 && !s="") | ^~ main.cpp:13:44: note: candidate: 'operator!(bool)' (built-in) main.cpp:13:44: note: no known conversion for argument 1 from 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'bool' main.cpp:15:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 15 | for(i=0;i<=s.size()-1;i++) | ~^~~~~~~~~~~~