Compilare: user.cpp: In function ‘int main()’: user.cpp:9:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("cifralipsa.in" , "r" , stdin ); ^ user.cpp:10:47: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("cifralipsa.out" , "w" , stdout ); ^ user.cpp:13:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d" , &t ); ^ user.cpp:16:18: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(sir); ^ user.cpp:17:13: warning: ‘s’ may be used uninitialized in this function [-Wmaybe-uninitialized] int s , l ,sol ; ^ /tmp/cc7j2FKg.o: In function `main': user.cpp:(.text.startup+0x8c): warning: the `gets' function is dangerous and should not be used.