Compilare: user.cpp: In function ‘int si()’: user.cpp:42:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] r=v[ch[i]]; ^ user.cpp:52:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] r=v[ch[i]]; ^ user.cpp: In function ‘int main()’: user.cpp:111:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[ch2]=(v[ch2]+1)%2; ^ user.cpp:111:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[ch2]=(v[ch2]+1)%2; ^ user.cpp:59:24: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(chi, 100, in); ^ user.cpp:106:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d\n", &n); ^ user.cpp:110:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%c", &ch2); ^