Compilare: user.cpp: In function ‘int main()’: user.cpp:73:26: warning: operation on ‘k’ may be undefined [-Wsequence-point] do {u[++k]=k*k+u[k-1];} while(u[k]<n); ^ user.cpp:73:26: warning: operation on ‘k’ may be undefined [-Wsequence-point] user.cpp:73:26: warning: operation on ‘k’ may be undefined [-Wsequence-point] user.cpp:78:23: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=] printf("%d\n",smin); ^ user.cpp: In function ‘void citire()’: user.cpp:16:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("suma4.in","r",stdin); ^ user.cpp:17:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("suma4.out","w",stdout); ^ user.cpp:18:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:21:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&k); ^