string - How have null value inside basic_string in c++ -

is there way have , process null value inside std::basic_string?

sometimes string sequence being passed has null values. example below code outputs 1234,5678 instead of whole string.

#include <iostream> #include <string> #include <cstring> int main () {    int length;    std::string str = "1234,5678\000,abcd,efg#";    std::cout << "length"<<str.c_str(); } 

i need complete string.

first, you'll have tell string constructor size; can determine size if input null-terminated. work:

std::string str("1234,5678\000,abcd,efg#", sizeof("1234,5678\000,abcd,efg#")-1); 

there's no particularly nice way avoid duplication; declare local array

char c_str[] = "1234,5678\000,abcd,efg#"; // in c++11, perhaps 'auto const & c_str = "...";' std::string str(c_str, sizeof(c_str)-1); 

which might have run-time cost; or use macro; or build string in pieces

std::string str = "1234,5678"; str += '\0'; str += ",abcd,efg#"; 

finally, stream string (for size known) rather extracting c-string pointer (for size determined looking null terminator):

std::cout << "length" << str; 

update: pointed out in comments, c++14 adds suffix basic_string literals:

std::string str = "1234,5678\000,abcd,efg#"s;                                            ^ 

which, reading of draft standard, should work if there embedded null character.