Compilare: main.cpp: In function 'void Read()': main.cpp:19:10: warning: unused variable 'x' [-Wunused-variable] char x; ^ main.cpp: In function 'int main()': main.cpp:88:48: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << r[x][y] << " " << x << " " << y << "\n"; ^~~~ main.cpp:88:36: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << r[x][y] << " " << x << " " << y << "\n"; ^~~