Compilare: user.cpp: In function ‘int cit(short int&)’: user.cpp:56: warning: no return statement in function returning non-void user.cpp:49: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result user.cpp:53: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘int main()’: user.cpp:60: warning: unused variable ‘k’