#include <iostream>
#include <cstring>
using namespace std;
 
int main() {
	char s[]="Hello";
	cout<<s<<endl;
	cout<<sizeof(s)<<endl;
	cout<<strlen(s)<<endl;
 
	strcpy(s, "123456789");
	cout<<s<<endl;
	cout<<sizeof(s)<<endl;
	cout<<strlen(s)<<endl;
 
	strcat(s, "qwe");
	cout<<s<<endl;
	cout<<sizeof(s)<<endl;
	cout<<strlen(s)<<endl;
 
	return 0;
}