Compilare: user.c: In function ‘main’: user.c:12:45: warning: unused variable ‘y’ [-Wunused-variable] int m, n, i, j, ok = 0, pal = 0, x = 2, y = 2; ^ user.c:12:38: warning: unused variable ‘x’ [-Wunused-variable] int m, n, i, j, ok = 0, pal = 0, x = 2, y = 2; ^ user.c: In function ‘cruce’: user.c:41:9: warning: unused variable ‘x’ [-Wunused-variable] int x=2; ^ user.c: In function ‘main’: user.c:17:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d", &n, &m); ^