Compilare: user.c: In function ‘main’: user.c:70:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &N); ^ user.c:73:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &op); ^ user.c:76:23: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &aux); ^ user.c:80:23: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &aux); ^ user.c: In function ‘heap_del’: user.c:45:30: warning: ‘itempos’ may be used uninitialized in this function [-Wmaybe-uninitialized] heap.insertrank[itempos] = heap.insertrank[heap.end--]; ^