c++ - Whats the error in it. string assignment -

i take data struct elements internal elements. better way it. shows error: invalid array assignmen berror: invalid array ssignment error: invalid array assignment error: ‘strcpy’ not declared in scope.

#include <iostream> #include <string> using namespace std;  struct {     char ip[16];     char port[6];     char sessionkey[32]; }   int main() {      char m_ip[16];     char m_port[6];     char m_sessionkey[32];      a;      a.ip = "10.43.160.94111";     a.port = "12345";     a.sessionkey = "12abcd12345abcd12345abcd1234512";       strcpy(m_ip,a.ip);     strcpy(m_port,a.port);     strcpy(m_sessionkey,a.sessionkey);      cout << "m_ip:" << m_ip << endl;     cout << "m_port:" << m_port << endl;     cout << "m_sessionkey:" << m_sessionkey << endl; } 

i think mean following (c string functions declared in header <cstring>)

    #include <cstring>      //...      char m_ip[16];     char m_port[6];     char m_sessionkey[32];      a = { "10.43.160.94111", "12345", "12abcd12345abcd12345abcd1234512" };      std::strcpy(m_ip,a.ip);     std::strcpy(m_port,a.port);     std::strcpy(m_sessionkey,a.sessionkey); 

or instead of

    a = { "10.43.160.94111", "12345", "12abcd12345abcd12345abcd1234512" }; 

you write

    a;     = { "10.43.160.94111", "12345", "12abcd12345abcd12345abcd1234512" }; 

provided compiler supports c++ 2011.

take account forgot place semicol after closing brace in structure definition

struct {     //... }; ^^^ 

edit: after unexpectedly changed code i'd point out code snippet

    a;      string p = "10.43.160.94111";     string q = "12345";     string r = "12abcd12345abcd12345abcd1234512";      p.copy(a.ip,16,0);     q.copy(a.port,6,0);     r.copy(a.sessionkey,32,0); 

does not make sense. there no sense introduce objects of type std::string initialize object of type struct a.

another thing define structure following way

struct {         std::string ip;         std::string port;         std::string sessionkey; };