Compilare: user.c: In function ‘main’: user.c:27:5: warning: implicit declaration of function ‘qsort’ [-Wimplicit-function-declaration] qsort(&x[1], n, sizeof(int), cmp); ^ user.c:21:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d\n", &n); ^ user.c:24:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", x+i); ^