Compilare: user.cpp: In function ‘int eval()’: user.cpp:19:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(ini[k]=='+' || ini[k]=='-') ^ user.cpp:19:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(ini[k]=='+' || ini[k]=='-') ^ user.cpp:21:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(ini[k]=='+') ^ user.cpp:23:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(ini[k]=='-') ^ user.cpp: In function ‘int termen()’: user.cpp:33:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(ini[k]=='/' || ini[k]=='*') ^ user.cpp:33:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(ini[k]=='/' || ini[k]=='*') ^ user.cpp:35:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(ini[k]=='/') ^ user.cpp:37:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(ini[k]=='*') ^ user.cpp: In function ‘int factor()’: user.cpp:47:13: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(ini[k]=='(') ^ user.cpp:49:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(ini[k]>='0' && ini[k]<='9') ^ user.cpp:49:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(ini[k]>='0' && ini[k]<='9') ^ user.cpp:50:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] r=r*10+ini[k]-'0', k++; ^