Compilare: user.cpp: In function ‘int main()’: user.cpp:80: warning: unused variable ‘j’ user.cpp:82: 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 ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:85: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:88: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int cb()’: user.cpp:25: warning: ‘med’ may be used uninitialized in this function user.cpp: In function ‘int cb2(long int)’: user.cpp:51: warning: ‘last’ may be used uninitialized in this function user.cpp:51: warning: ‘med’ may be used uninitialized in this function