Compilare: user.c: In function ‘bubble’: user.c:24:10: warning: pointer targets in passing argument 1 of ‘swap’ differ in signedness [-Wpointer-sign] swap(&v[j].a, &v[j+1].a); ^ user.c:12:6: note: expected ‘int *’ but argument is of type ‘unsigned int *’ void swap(int *x, int *y) ^~~~ user.c:24:19: warning: pointer targets in passing argument 2 of ‘swap’ differ in signedness [-Wpointer-sign] swap(&v[j].a, &v[j+1].a); ^ user.c:12:6: note: expected ‘int *’ but argument is of type ‘unsigned int *’ void swap(int *x, int *y) ^~~~ user.c:25:10: warning: pointer targets in passing argument 1 of ‘swap’ differ in signedness [-Wpointer-sign] swap(&v[j].b, &v[j+1].b); ^ user.c:12:6: note: expected ‘int *’ but argument is of type ‘unsigned int *’ void swap(int *x, int *y) ^~~~ user.c:25:19: warning: pointer targets in passing argument 2 of ‘swap’ differ in signedness [-Wpointer-sign] swap(&v[j].b, &v[j+1].b); ^ user.c:12:6: note: expected ‘int *’ but argument is of type ‘unsigned int *’ void swap(int *x, int *y) ^~~~ user.c: In function ‘main’: user.c:33:2: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen(in, "rt", stdin); ^~~~~~~~~~~~~~~~~~~~~~~~ user.c:34:2: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen(out, "wt", stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~ user.c:37:2: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^~~~~~~~~~~~~~~ user.c:42:3: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &v[i].a, &v[i].b); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~