Compilare: user.cpp: In function ‘int main()’: user.cpp:20:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] f[c]++; ^ user.cpp:34:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(u[v[b]] + 1 > f[v[b]] / 2) b++; ^ user.cpp:34:43: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(u[v[b]] + 1 > f[v[b]] / 2) b++; ^ user.cpp:35:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] u[v[b]]++; ^ user.cpp:11:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d", &t); ^ user.cpp:42:28: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] w[a] = last; ^