Compilare: user.cpp: In function ‘void valid(int, int)’: user.cpp:26:9: warning: unused variable ‘ok’ [-Wunused-variable] int ok=0; ^ user.cpp: In function ‘void citire()’: user.cpp:48:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:52:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ user.cpp: In function ‘int main()’: user.cpp:59:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sprim.in","r",stdin); ^ user.cpp:60:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sprim.out","w",stdout); ^ user.cpp: In function ‘void sterge()’: user.cpp:20:18: warning: iteration 100001u invokes undefined behavior [-Waggressive-loop-optimizations] if(a[i][0]==2) ^ user.cpp:18:5: note: containing loop for(int i=2;i<=1000000;i++) ^ user.cpp: In function ‘void valid(int, int)’: user.cpp:20:18: warning: iteration 100001u invokes undefined behavior [-Waggressive-loop-optimizations] if(a[i][0]==2) ^ user.cpp:18:5: note: containing loop for(int i=2;i<=1000000;i++) ^