Compilare: main.cpp: In function 'int main()': main.cpp:15:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for(i=0;i<s.size();i++) | ~^~~~~~~~~ main.cpp:21:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(int j=i;j<s.size()-1;j++) | ~^~~~~~~~~~~ main.cpp:34:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for(i=0;i<s.size();i++) | ~^~~~~~~~~ main.cpp:40:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(int j=i;j<s.size()-1;j++) | ~^~~~~~~~~~~ main.cpp:58:6: warning: statement has no effect [-Wunused-value] 58 | for(i;i<a.size();i++) | ^ main.cpp:58:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | for(i;i<a.size();i++) | ~^~~~~~~~~ main.cpp:64:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | for(int j=0;j<s.size()-1;j++) | ~^~~~~~~~~~~