Compilare: user.cpp: In function ‘int cmp_number(const int&, const int&)’: user.cpp:22: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp: In function ‘int main()’: user.cpp:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:46: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result user.cpp: In function ‘int cmp_number(const int&, const int&)’: user.cpp:28: warning: control reaches end of non-void function /tmp/ccaVKJOD.o: In function `main': user.cpp:(.text+0x56): warning: the `gets' function is dangerous and should not be used.