Compilare: user.c: In function ‘quicksort’: user.c:11:23: warning: unused variable ‘t’ [-Wunused-variable] int pivot,j,i,aux,t; ^ user.c: In function ‘main’: user.c:42:19: warning: unused variable ‘j’ [-Wunused-variable] int n,i,z,r,c,j,m; ^ user.c:42:15: warning: unused variable ‘r’ [-Wunused-variable] int n,i,z,r,c,j,m; ^ user.c:42:13: warning: variable ‘z’ set but not used [-Wunused-but-set-variable] int n,i,z,r,c,j,m; ^ user.c:45:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ user.c:47:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&x[i],&y[i]); ^