Compilare: user.cpp: In function ‘int main()’: user.cpp:88: warning: deprecated conversion from string constant to ‘char*’ user.cpp:100: warning: deprecated conversion from string constant to ‘char*’ user.cpp:96: warning: unused variable ‘x’ user.cpp:79: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:80: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:83: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:87: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result