Compilare: user.cpp: In function ‘void cit(int&)’: user.cpp:13: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result user.cpp:19: 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:79: warning: control reaches end of non-void function user.cpp: In function ‘int cauta1(int, int)’: user.cpp:62: warning: control reaches end of non-void function user.cpp: In function ‘int cauta0(int, int)’: user.cpp:45: warning: control reaches end of non-void function user.cpp: In function ‘int main()’: user.cpp:91: warning: ‘aux’ may be used uninitialized in this function