Compilare: user.c: In function ‘dfs’: user.c:77:10: warning: unused variable ‘ic’ [-Wunused-variable] int ir, ic, idir; ^ user.c:77:6: warning: unused variable ‘ir’ [-Wunused-variable] int ir, ic, idir; ^ user.c: In function ‘read_lab’: user.c:37:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &r, &c); ^ user.c:40:9: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ user.c: In function ‘main’: user.c:111:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("verlab.in", "r", stdin); ^ user.c:112:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("verlab.out", "w", stdout); ^ user.c:114:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^