Is it possible to shorten commands such as cout, cin, etc?

Question

For example can I change cout to like c?

Answer 1

Yes, in fact. Try something like this:

#include <iostream>
#define c cout

using namespace std;

int main(){
c << "Hello, World!" << endl;
return 0;
}

Answer 2

so the command is #define (variable) (command)?

Answer 3

Not just commands. You can do this with pretty much anything. If you felt like replacing semicolons with "semi" for some reason, you could write:

#define semi ;