Compilare: user.cpp: In function ‘int main()’: user.cpp:11:9: warning: unused variable ‘n’ [-Wunused-variable] int n,i,st,nr,ok; ^ user.cpp:11:13: warning: unused variable ‘st’ [-Wunused-variable] int n,i,st,nr,ok; ^ user.cpp:11:19: warning: unused variable ‘ok’ [-Wunused-variable] int n,i,st,nr,ok; ^ user.cpp:9:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("palalila2.in","r",stdin); ^ user.cpp:10:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("palalila2.out","w",stdout); ^ user.cpp:12:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ /tmp/cctgpUPd.o: In function `main': user.cpp:(.text.startup+0x54): warning: the `gets' function is dangerous and should not be used.