Compilare: user.cpp: In function ‘int factor(char*, int&, int*)’: user.cpp:63:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] r = vl[s[pp]], ^ user.cpp: In function ‘int fun(int*, char)’: user.cpp:81:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] vl[f[k][i]] = param[++vlp]; ^ user.cpp: In function ‘int main()’: user.cpp:95:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] val[a[0]] = a[2]-'0'; ^ user.cpp:97:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] val[a[0]] = val[a[0]] * 10 + a[3]-'0'; ^ user.cpp:97:37: warning: array subscript has type ‘char’ [-Wchar-subscripts] val[a[0]] = val[a[0]] * 10 + a[3]-'0'; ^ user.cpp:99:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] val[a[0]] = val[a[0]] * 10 + a[4]-'0'; ^ user.cpp:99:37: warning: array subscript has type ‘char’ [-Wchar-subscripts] val[a[0]] = val[a[0]] * 10 + a[4]-'0'; ^ user.cpp:117:36: warning: array subscript has type ‘char’ [-Wchar-subscripts] param[++par] = val[v[i]]; ^