Compilare: user.c: In function ‘heap_remove’: user.c:81:9: warning: variable ‘newmin’ set but not used [-Wunused-but-set-variable] int newmin; ^ user.c: In function ‘main’: user.c:162:18: warning: variable ‘h_size’ set but not used [-Wunused-but-set-variable] int n, m, i, h_size; ^ user.c: In function ‘graph_init’: user.c:60:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(infile, "%d %d %d",&x,&y,&r); ^ user.c: In function ‘main’: user.c:164:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(infile, "%d %d",&n,&m); ^