c++ - Error in String class to CString Conversion -

i want put 3 string variables in 1 array besides each other cstring. code gives me error declaration.

#include <iostream> #include <string> using namespace std;  int main() {     string str1, str2, str3;     cin >> str1 >> str2 >> str3;      int length_str1 = str1.size(), length_str2 = str2.size(), length_str3 = str3.size();     char acstring[length_str1+length_str2+length_str3+1];      string str_array [] = {str1, str2, str3};     strcpy(acstring, str_array.c_str());      return 0; } 

errors:

there 2 errors in code:

1. 14:32: error: request member 'c_str' in 'str_array', of non-class type 'std::string [3] {aka std::basic_string<char> [3]}' 2. 14:39: error: 'strcpy' not declared in scope

reasons:

• first error because trying call c_str str_array pointer array of strings, right way call string i.e. str_array[someindexofarray]
• reason behind second error string.h contains method strcpy not included in program.

solution:

try following code:

#include <iostream> #include <string>  #include <string.h>     //for strcpy , strcat method  using namespace std;  int main() {     string str1, str2, str3;     cin >> str1 >> str2 >> str3;      int length_str1 = str1.size();     int length_str2 = str2.size();     int length_str3 = str3.size();      char acstring[length_str1+length_str2+length_str3+1];      string str_array[] = {str1, str2, str3};      strcpy(acstring, str_array[0].c_str()); //copy first index of array       for(int =1;i<3;i++)   //concatenate each index of array         strcat(acstring, str_array[i].c_str());      return 0; } 

hope helps.