c++ string char * 字符串

#include <iostream>     // std::cout
#include <algorithm>    // std::set_intersection, std::sort
#include <vector>       // std::vector
#include <string>

using namespace std;

int main ()
{
    char * name = "zengzhaonong";
    string task_name;
    char * layer_task_name;
    int len;

    task_name = name;   // char * --> string
    printf ("task_name = %s\n", task_name.c_str());

    len = task_name.length();
    layer_task_name = (char *)malloc(len + 1);
    strncpy(layer_task_name, task_name.c_str(), len+1); // string --> char *
    printf ("layer_task_name = %s\n", layer_task_name);

    return 0;

}