Compilare: user.cpp: In function ‘int main()’: user.cpp:61: warning: deprecated conversion from string constant to ‘char*’ user.cpp:72: warning: deprecated conversion from string constant to ‘char*’ user.cpp:68: warning: unused variable ‘x’ user.cpp:53: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:54: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:56: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:60: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result