Compilare: user.cpp: In function ‘void second_task()’: user.cpp:81:12: warning: unused variable ‘x’ [-Wunused-variable] int i, x, y, dad, son; ^ user.cpp:81:15: warning: unused variable ‘y’ [-Wunused-variable] int i, x, y, dad, son; ^ user.cpp: In function ‘int main()’: user.cpp:125:20: warning: unused variable ‘j’ [-Wunused-variable] int xc, yc, i, j, p; ^ user.cpp: In function ‘void first_task(int, int)’: user.cpp:73:28: warning: ‘soly’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << solx << " " << soly << " " << sol; ^ user.cpp:73:13: warning: ‘solx’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << solx << " " << soly << " " << sol; ^