Compilare: user.cpp: In function ‘int factor(char, int*)’: user.cpp:20:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<mpp[f].size() && isdigit(mpp[f][j])) ^ user.cpp: In function ‘int termen(char, int*)’: user.cpp:30:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<mpp[f].size() && mpp[f][j]=='*') ^ user.cpp: In function ‘int ev_exp(char, int*)’: user.cpp:38:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<mpp[f].size()) ^ user.cpp: In function ‘int evaluare()’: user.cpp:78:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<s.size() && s[i]!=',' && s[i]!=')') ^ user.cpp:81:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<mpp[f].size();++j) ^ user.cpp:76:10: warning: unused variable ‘okk’ [-Wunused-variable] bool okk=0; ^ user.cpp: In function ‘int main()’: user.cpp:89:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s.size();++i) ^ user.cpp:90:38: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(isalpha(s[i]) && !fol[s[i]]) ^ user.cpp:92:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] fol[s[i]]=1; ^ user.cpp:101:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2;i<eval.size();++i)nr=nr*10+eval[i]-'0'; ^