Compilare: user.cpp: In function ‘void cit(int&)’: user.cpp:15: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result user.cpp:23: 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 cauta2(int, int)’: user.cpp:81: warning: control reaches end of non-void function user.cpp: In function ‘int cauta1(int, int)’: user.cpp:64: warning: control reaches end of non-void function user.cpp: In function ‘int cauta0(int, int)’: user.cpp:47: warning: control reaches end of non-void function user.cpp: In function ‘int main()’: user.cpp:92: warning: ‘aux’ may be used uninitialized in this function