Compilare: user.c: In function ‘main’: user.c:12:2: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] (void)scanf("%c",&tmp); ^ user.c:15:3: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] (void)scanf("%c", &tmp); ^ user.c:20:5: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] (void)scanf("%c",&tmp); ^ user.c:26:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] (void)scanf("%c",&t); ^ user.c:46:2: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] (void)scanf("%c", &tmp); ^ user.c:49:3: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] (void)scanf("%c", &tmp); ^ user.c:55:5: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] (void)scanf("%c",&tmp); ^ user.c:58:6: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] (void)scanf("%c",&tmp); ^ user.c:61:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] (void)scanf("%c",&tmp); ^ user.c:69:8: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] (void)scanf("%c",&t); ^ user.c:80:8: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] (void)scanf("%c",&tmp); ^