Compilare: user.cpp: In function ‘void back(char, char, char, char)’: user.cpp:24:6: warning: array subscript has type ‘char’ [-Wchar-subscripts] { s[k]=s[k-1]+p[n-k+1][val]; ^ user.cpp:24:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] { s[k]=s[k-1]+p[n-k+1][val]; ^ user.cpp:25:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(s[k]+calc(k)<smin) ^ user.cpp:26:8: warning: array subscript has type ‘char’ [-Wchar-subscripts] { x[k]=val; ^ user.cpp:27:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[lin][col]=0; ^ user.cpp:27:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[lin][col]=0; ^ user.cpp:40:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[lin][col]=x[k]; ^ user.cpp:40:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[lin][col]=x[k]; ^ user.cpp:40:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[lin][col]=x[k]; ^ user.cpp:42:8: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(s[k]+calc1(k)<smin) ^ user.cpp:43:8: warning: array subscript has type ‘char’ [-Wchar-subscripts] { x[k]=val; ^ user.cpp:44:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[lin][col]=0; ^ user.cpp:44:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[lin][col]=0; ^ user.cpp:57:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[lin][col]=x[k]; ^ user.cpp:57:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[lin][col]=x[k]; ^ user.cpp:57:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[lin][col]=x[k]; ^ user.cpp: In function ‘int main()’: