Compilare: main.cpp: In function 'int ciur(int)': main.cpp:19:14: warning: no return statement in function returning non-void [-Wreturn-type] prime[++u]=i;} ^ main.cpp: In function 'int main()': main.cpp:35:30: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cmmmc.in","r",stdin); ^ main.cpp:36:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cmmmc.out","w",stdout); ^ main.cpp:39:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&k); ^ main.cpp:42:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^