Compilare: user.cpp: In function ‘int numar()’: user.cpp:12:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(s[t]=='(') ^ user.cpp:20:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(s[t]>='0'&&s[t]<='9') ^ user.cpp:20:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(s[t]>='0'&&s[t]<='9') ^ user.cpp:22:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] nr=nr*10+(s[t]-'0'); ^ user.cpp: In function ‘int op2()’: user.cpp:32:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(s[t]=='+'||s[t]=='-') ^ user.cpp:32:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(s[t]=='+'||s[t]=='-') ^ user.cpp:34:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(s[t]=='+') ^ user.cpp:39:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] else if(s[t]=='/') ^ user.cpp: In function ‘int op1()’: user.cpp:51:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(s[t]=='*'||s[t]=='/') ^ user.cpp:51:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(s[t]=='*'||s[t]=='/') ^ user.cpp:53:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(s[t]=='*') ^ user.cpp:58:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] else if(s[t]=='/') ^