Compilare: user.c: In function ‘main’: user.c:33:5: warning: passing argument 4 of ‘psort’ from incompatible pointer type [enabled by default] psort(v+1,N,4,comp); ^ user.c:13:6: note: expected ‘int (*)(void *, void *)’ but argument is of type ‘int (*)(const void *, const void *)’ void psort(void*,int,int,int(*comp)(void*,void*)); ^ user.c: In function ‘swap’: user.c:73:8: warning: operation on ‘*x’ may be undefined [-Wsequence-point] *x ^= *y ^= *x ^= *y; ^ user.c: In function ‘main’: user.c:21:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&N); ^ user.c:24:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",v+i); ^