Compilare: user.cpp: In function ‘bool expresie()’: user.cpp:35:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(s[i]=='O' && s[i+1]=='R') ^ user.cpp: In function ‘bool termen()’: user.cpp:46:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(s[i]=='A' && s[i+1]=='N') ^ user.cpp: In function ‘bool fact()’: user.cpp:57:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(s[i]=='(') ^ user.cpp:63:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] else if(s[i]=='F' && s[i+1]=='A') ^ user.cpp:68:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] else if(s[i]=='T' && s[i+1]=='R') ^ user.cpp:75:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] r=a[s[i]-'A']; ^