Compilare: user.cpp: In function ‘long int lee()’: user.cpp:45: warning: no return statement in function returning non-void user.cpp: In function ‘int main()’: user.cpp:50: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:51: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:52: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:55: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:49: warning: ‘im’ may be used uninitialized in this function user.cpp:49: warning: ‘jm’ may be used uninitialized in this function