Compilare: user.c: In function ‘main’: user.c:56:11: warning: unused variable ‘f2’ [-Wunused-variable] FILE *f1,f2; ^ user.c:56:8: warning: unused variable ‘f1’ [-Wunused-variable] FILE *f1,f2; ^ user.c:57:10: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen ("prietenie3.in","r",stdin); ^ user.c:58:10: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen ("prietenie3.out","w",stdout); ^ user.c:62:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &nr_teste); ^ user.c:65:8: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.c:66:8: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &M); ^ user.c:72:9: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &V[j]); ^ user.c:74:9: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &R[k]); ^