Compilare: user.c:65:1: warning: return type defaults to ‘int’ [enabled by default] pune_in_stiva(int nod) ^ user.c:78:1: warning: return type defaults to ‘int’ [enabled by default] scoate_din_stiva() ^ user.c: In function ‘citire’: user.c:24:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("dfs.in","r",stdin); ^ user.c:25:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("dfs.out","w",stdout); ^ user.c:26:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&m); ^ user.c:32:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&x,&y); ^ user.c: In function ‘pune_in_stiva’: user.c:74:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘scoate_din_stiva’: user.c:86:1: warning: control reaches end of non-void function [-Wreturn-type] } ^