Jaebum questions

• Question about C fopen function
• Copy identical fields of different struct in rust [duplicate]
• Undefined reference to C Macro, but gets redefined error when I define it
• friend of specialized template class (C++)
• C++ both input and output pipe to the external program
• Why do blanket implementations for two different traits conflict?
• How does the address of R_X86_64_PLT32 computed?
• How does scanf() really work?
• C++ Template type deduction for temporary value
• C++ simple inheritance problem

Jaebum answers