/*  Write a function that maps files to their extension names.
 */

std::vector<std::string> getExtension(std::vector<std::string> arr) {
	std::vector<std::string> extensions;
	for(int i=0;i<arr.size();i++){
		// create a std::string and assign the element value to the variable
		std::string tempstring = arr[i];
		for(int j=tempstring.size();j>0;j--){
			if(tempstring[j]== '.'){
				extensions.push_back(tempstring.substr(j+1));
				break;
			}
		}
	}
	return extensions;
}