Compilare: user.cpp: In function ‘int reunire(int, int)’: user.cpp:13:31: warning: no return statement in function returning non-void [-Wreturn-type] if(rang[y]>rang[x])t[x]=y;} ^ user.cpp: In function ‘int parfum(int)’: user.cpp:7:28: warning: control reaches end of non-void function [-Wreturn-type] else t[x]=parfum(t[x]);} ^ user.cpp: In function ‘int main()’: user.cpp:18:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("disjoint.in","r",stdin); ^ user.cpp:20:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:24:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&ce,&x,&y); ^