#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;
}
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