###################################################

#include <string.h>
#include <string>

using namespace std;


int main()
{
    char ans[1024] = {0};
    char ans_[64] = {"hi, zhangsan"};
    char ans_2[64] = {"my name  is :lisi! how about you !"};
    strcat(ans, ans_);
    sprintf(ans+strlen(ans), "\n%s", ans_2);
    std::cout<<ans<<std::endl;
    std::cout<<"ans_ the strlen is "<<strlen(ans_)<<"\tthe sizeof is "<<sizeof(ans_)<<std::endl;
    std::cout<<"ans_2 the strlen is "<<strlen(ans_2)<<"\tthe sizeof is "<<sizeof(ans_2)<<std::endl;
    std::cout<<"ans the strlen is "<<strlen(ans)<<"\tthe sizeof is "<<sizeof(ans)<<std::endl;
    

    return 0;
}