Compilare: user.c: In function ‘main’: user.c:21:13: warning: unused variable ‘pos’ [-Wunused-variable] int n, k, pos; ^ user.c: In function ‘comb’: user.c:16:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘main’: user.c:22:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &k); ^