Compilare: user.cpp: In function ‘int reunire(int, int)’: user.cpp:13:33: warning: no return statement in function returning non-void [-Wreturn-type] if(rang[x]==rang[y])rang[x]++;} ^ 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:16:37: 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:18:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:22:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&ce,&x,&y); ^