Compilare: main.cpp: In function 'int calcul()': main.cpp:19:14: warning: array subscript has type 'char' [-Wchar-subscripts] while(s[i]=='+' || s[i]=='-') ^ main.cpp:19:27: warning: array subscript has type 'char' [-Wchar-subscripts] while(s[i]=='+' || s[i]=='-') ^ main.cpp:21:15: warning: array subscript has type 'char' [-Wchar-subscripts] if(s[i]=='+') ^ main.cpp: In function 'int termen()': main.cpp:40:14: warning: array subscript has type 'char' [-Wchar-subscripts] while(s[i]=='*' || s[i]=='/') ^ main.cpp:40:27: warning: array subscript has type 'char' [-Wchar-subscripts] while(s[i]=='*' || s[i]=='/') ^ main.cpp:42:15: warning: array subscript has type 'char' [-Wchar-subscripts] if(s[i]=='*') ^ main.cpp: In function 'int factor()': main.cpp:60:10: warning: array subscript has type 'char' [-Wchar-subscripts] if(s[i]=='(') ^ main.cpp:68:18: warning: array subscript has type 'char' [-Wchar-subscripts] while(s[i]>='0' && s[i]<='9') ^ main.cpp:68:31: warning: array subscript has type 'char' [-Wchar-subscripts] while(s[i]>='0' && s[i]<='9') ^ main.cpp:70:24: warning: array subscript has type 'char' [-Wchar-subscripts] x=x*10+(s[i]-48); ^