Compilare: user.cpp: In function ‘int main()’: user.cpp:77:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] cx+=x[fel]; ^ user.cpp:78:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] cy+=y[fel]; ^ user.cpp:80:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp:62:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(si,"%i %i",&n,&m); ^ user.cpp:85:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(si,"%i",&q); ^ user.cpp:89:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(si,"%i %i",&a1,&a2); ^ user.cpp:66:10: warning: ‘fel’ may be used uninitialized in this function [-Wmaybe-uninitialized] char fel; ^