Compilare: main.cpp: In function 'void debut()': main.cpp:36:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(i=0;i<s.size()-1;i++) | ~^~~~~~~~~~~ main.cpp: In function 'bool sau()': main.cpp:54:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | while(i<c.size()&&c[i]=='/') | ~^~~~~~~~~ main.cpp: In function 'bool si()': main.cpp:64:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | while(i<c.size()&&c[i]=='&') | ~^~~~~~~~~ main.cpp: In function 'bool nu()': main.cpp:75:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 75 | while(i<c.size()&&c[i]=='!') | ~^~~~~~~~~ main.cpp:82:1: warning: control reaches end of non-void function [-Wreturn-type] 82 | } | ^