Compilare: user.cpp: In function ‘int main()’: user.cpp:24:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(i='A';i<='Z';i++) val[i]=0; ^ user.cpp:31:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] val[c]=!val[c]; ^ user.cpp:31:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] val[c]=!val[c]; ^ user.cpp: In function ‘char caracter(int&)’: user.cpp:39:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;i<s.size() && isalpha(s[i]);i++) aux+=s[i]; i--; ^ user.cpp:46:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘void rezolvare()’: user.cpp:49:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<str.size();i++) ^ user.cpp:53:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] nr.push(val[str[i]]); ^ user.cpp:57:48: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(op.empty()==0 && val[op.top()]>val[str[i]]) ^ user.cpp:57:60: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(op.empty()==0 && val[op.top()]>val[str[i]]) ^ user.cpp: In function ‘void trans()’: user.cpp:97:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<s.size();i++) ^