Compilare: main.cpp: In function 'int evaluare()': main.cpp:22:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | while(s[i]=='+'||s[i]=='-'&&i<s.size()-1) | ~^~~~~~~~~~~ main.cpp:22:31: warning: suggest parentheses around '&&' within '||' [-Wparentheses] 22 | while(s[i]=='+'||s[i]=='-'&&i<s.size()-1) main.cpp: In function 'int termen()': main.cpp:32:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | while(s[i]=='*'||s[i]=='/'&&i<s.size()-1) | ~^~~~~~~~~~~ main.cpp:32:31: warning: suggest parentheses around '&&' within '||' [-Wparentheses] 32 | while(s[i]=='*'||s[i]=='/'&&i<s.size()-1) main.cpp: In function 'int element()': main.cpp:60:12: warning: 'res' may be used uninitialized [-Wmaybe-uninitialized] 60 | return res; | ^~~ main.cpp:49:9: note: 'res' was declared here 49 | int res; | ^~~