#define f(g,g2) g##g2

Question

#define f(g,g2) g##g2
main()
{
int var12=100;
printf(\"%d\",f(var,12));
}

The above program prints 100 in c by concatenating var and 12. How does g

Answer 1

So after preprocess it will look like this:

main()
{
int var12=100;
printf("%d",var12);
}