Radoslaw Krasimirow questions

• Declaring vs defining variables in c [duplicate]
• What does the main() function mean for a program
• What is the difference between %.c and *.c in GNU Make
• How to implement a macro in C
• Some parts of this C code doesn't make sense for me
• Basic integer assignment
• Understanding output of printf containing backslash (\012)
• What does `((void (*)())0x1000)();` mean? [duplicate]

Radoslaw Krasimirow answers