Avoid catastrophic function-argument type declarations

If you're declaring a function where all five arguments are ints, then life is good. you can simply write

f(a,b,c,d,e){

But suppose d needs to be a char, or even an int*. Then you're screwed! If one parameter is preceded by a type, all of them must be:

f(int a,int b,int c,int*d,int e){

But wait! There is a way around this disastrous explosion of useless characters. It goes like this:

f(a,b,c,d,e) int *d; {

This even saves on a standard main declaration if you need to use the command-line arguments:

main(c,v)char**v;{

is two bytes shorter than

main(int c,char**v){

I was surprised to discover this, as I have not so far encountered it on PPCG.