Compilare: user.cpp: In function ‘int expresie()’: user.cpp:14:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(s[i]=='+' || s[i]=='-') ^ user.cpp:14:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(s[i]=='+' || s[i]=='-') ^ user.cpp:15:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(s[i]=='+') ^ user.cpp: In function ‘int termen()’: user.cpp:33:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(s[i]=='*' || s[i]=='/') ^ user.cpp:33:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(s[i]=='*' || s[i]=='/') ^ user.cpp:34:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(s[i]=='*') ^ user.cpp: In function ‘int factor()’: user.cpp:54:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(s[i]=='(') ^ user.cpp:63:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(s[i]>='0' && s[i]<='9') ^ user.cpp:63:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(s[i]>='0' && s[i]<='9') ^ user.cpp:65:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] r=r*10+s[i]-'0'; ^