Compilare: user.cpp: In function ‘int main()’: user.cpp:11:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("loto.in","r",stdin); ^ user.cpp:12:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("loto.out","w",stdout); ^ user.cpp:17:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&N,&S); ^ user.cpp:18:48: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for( i = 1; i <= N; ++i ) scanf("%d",&x[i]); ^ user.cpp:56:73: warning: ‘s6’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%d %d %d %d %d %d\n",x[s1],x[s2],x[s3],x[s4],x[s5],x[s6]); ^ user.cpp:56:73: warning: ‘s5’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:56:73: warning: ‘s4’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:56:73: warning: ‘s3’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:56:73: warning: ‘s2’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:56:73: warning: ‘s1’ may be used uninitialized in this function [-Wmaybe-uninitialized]