Compilare: user.c: In function ‘main’: user.c:31:19: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘int *’ [-Wformat=] printf("%d", nr); ^ user.c:26:10: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("pascal.in", "r", stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ user.c:27:10: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("pascal.out", "w", stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ user.c:29:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &l, &d); ^~~~~~~~~~~~~~~~~~~~~~ user.c:30:11: warning: ‘nr’ is used uninitialized in this function [-Wuninitialized] C(l, d, nr); ^~~~~~~~~~~