Write a C-program that contains two print macro calls. The first prints the variable a, the
second prints the variables a and b. Printing happens by the use of the PRINT1 and
PRINT2 macros that accept arguments. These macros must be defined in an include-file.
The variables a and b gets their value in the function main().
Name the program “Macro.c” and the include-file “Defs.h”. Don’t forget to implement
the mechanism to avoid multiple inclusion of the header file.