Compilare: user.cpp: In function ‘int radacina(int)’: user.cpp:22:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:27:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("meciul.in","r",stdin); ^ user.cpp:28:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("meciul.out","w",stdout); ^ user.cpp:30:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&T); ^ user.cpp:33:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&N,&M); ^ user.cpp:44:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^ user.cpp: In function ‘int radacina(int)’: user.cpp:18:17: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] while (tata[r]!=r) r=tata[r]; ^ user.cpp: In function ‘int main()’: user.cpp:18:17: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:16:17: note: ‘r’ was declared here int aux=nod, r; ^ user.cpp:18:17: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] while (tata[r]!=r) r=tata[r]; ^ user.cpp:16:17: note: ‘r’ was declared here int aux=nod, r; ^ user.cpp:18:17: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] while (tata[r]!=r) r=tata[r]; ^ user.cpp:16:17: note: ‘r’ was declared here int aux=nod, r; ^ user.cpp:18:17: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] while (tata[r]!=r) r=tata[r]; ^ user.cpp:16:17: note: ‘r’ was declared here int aux=nod, r; ^ user.cpp:18:17: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] while (tata[r]!=r) r=tata[r]; ^