Compilare: user.c: In function ‘sieve’: user.c:26:34: warning: unused variable ‘limit’ [-Wunused-variable] int step, count = 1, flag = 0, limit = sqrt(Nadejde); ^ user.c: In function ‘main’: user.c:46:10: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("prim.out", "w", stdout); ^ user.c:48:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &K); ^