/*  Create a function that takes a string as an argument 
 ~  and returns a coded (h4ck3r 5p34k) version of the string.
 ~  In order to work properly, the function should replace 
 ~  all 'a's with 4, 'e's with 3, 'i's with 1, 'o's with 0, and 's's with 5.
 */ 
std::string hackerSpeak(std::string str) {
	std::string empty = "";
	for (int i=0;i<str.size();i++){
		switch(str[i]) {
			case 'a' : str.replace(i,1,"4"); break;
			case 'e' : str.replace(i,1,"3"); break;
			case 'i' : str.replace(i,1,"1"); break;
			case 'o' : str.replace(i,1,"0"); break;
			case 's' : str.replace(i,1,"5"); break;
		}	
	}
	return str;
}