Compilare: main.cpp: In function 'int getnumber(std::__cxx11::string, int&)': main.cpp:19:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<s.size()&&'0'<=s[j]&&s[j]<='9'){ ~^~~~~~~~~ main.cpp: In function 'int gettermen(std::__cxx11::string, int&, int*)': main.cpp:38:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;i<s.size();i++){ ~^~~~~~~~~ main.cpp: In function 'int rezolva_functie(char, int*)': main.cpp:56:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s.size();i++){ ~^~~~~~~~~ main.cpp:68:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<s.size()&&s[i]=='-'){ ~^~~~~~~~~ main.cpp:70:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] }else if(i<s.size()&&s[i]=='+'){ ~^~~~~~~~~