Compilare: main.cpp: In function 'int main()': main.cpp:39:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for(i=0;i<c.size();++i) | ~^~~~~~~~~ main.cpp:46:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for(i=0;i<a.size();++i) | ~^~~~~~~~~ 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 | for(i=0;i<b.size();++i) | ~^~~~~~~~~ main.cpp:60:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | for(i=0;i<c.size()+1;++i) | ~^~~~~~~~~~~ main.cpp:71:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 71 | if(c[i]=='*' && i<c.size()) | ~^~~~~~~~~ main.cpp:77:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 77 | if(a[i]=='*' && i<a.size()) | ~^~~~~~~~~ main.cpp:83:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 83 | if(b[i]=='*' && i<b.size()) | ~^~~~~~~~~ main.cpp:32:11: warning: unused variable 'j' [-Wunused-variable] 32 | int i,j,nr,t; | ^