#define d3f@u17 default
#define sw17ch switch
#define c@s3 case
//Don't you dare do this.
Aside from that, filipe +1 on all counts. default is spelled with a lowercase 'L' and '1' represents the number 49 (the decimal ASCII code for the character '1') while 1 represents itself.
Also... did you #include <iostream> ? Some compilers and IDEs include it by default, but it's a good habit to include it regardless. If you did and just didn't add that line... well, nevermind!