Compilare: user.cpp: In function ‘int GetInt()’: user.cpp:28: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result user.cpp:32: 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 APM()’: user.cpp:120: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void Back(int)’: user.cpp:151: warning: comparison between signed and unsigned integer expressions