Compilare: user.cpp: In function ‘int main()’: user.cpp:10:44: warning: unused variable ‘x2’ [-Wunused-variable] int n, m, x, y, i, j, k, a[51][51], t, x2, y2, f, ltc, lbc, i2, j2, ok=1, h; ^ user.cpp:10:48: warning: unused variable ‘y2’ [-Wunused-variable] int n, m, x, y, i, j, k, a[51][51], t, x2, y2, f, ltc, lbc, i2, j2, ok=1, h; ^