Compilare: main.cpp: In function 'void debut()': main.cpp:35:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for(i=0;i<s.size();i++) | ~^~~~~~~~~ main.cpp: In function 'bool sau()': main.cpp:53:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | while(i<c.size()&&c[i]=='|') | ~^~~~~~~~~ main.cpp: In function 'bool si()': main.cpp:63:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | while(i<c.size()&&c[i]=='&') | ~^~~~~~~~~ main.cpp: In function 'bool nu()': main.cpp:74:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 74 | while(i<c.size()&&c[i]=='!') | ~^~~~~~~~~ main.cpp:81:1: warning: control reaches end of non-void function [-Wreturn-type] 81 | } | ^