Compilare: user.cpp: In function ‘int analiza(std::string)’: user.cpp:44:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<x.size();i++) ^ user.cpp:68:50: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(!op.empty()&&p[op.top()]>p[x[i]]) ^ user.cpp:68:58: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(!op.empty()&&p[op.top()]>p[x[i]]) ^ user.cpp: In function ‘void back(int, int, int&)’: user.cpp:86:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp: In function ‘int ap(std::string, std::string)’: user.cpp:114:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] apa[j]=apb[j]=0; ^ user.cpp:114:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] apa[j]=apb[j]=0; ^ user.cpp:116:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<a1.size();i++) ^ user.cpp:118:37: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(isalpha(a1[i])) apa[a1[i]]=1; ^ user.cpp:120:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<b1.size();i++) ^ user.cpp:122:37: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(isalpha(b1[i])) apb[b1[i]]=1; ^ user.cpp:126:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(apa[j]==apb[j]) ^ user.cpp:126:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(apa[j]==apb[j]) ^ user.cpp:128:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(apa[j]==1) c.push_back(j); ^ user.cpp: In function ‘int main()’: user.cpp:139:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,d,r=1; ^