converting a string to const char C++ code example

Example 1: std string to const char * c++

std::string a = "string";
const char* b = a.c_str();

Example 2: c++ convert const char* to int

#include <iostream>
#include <sstream>

const char* value = "1234567";
stringstream strValue;
strValue << value;

unsigned int intValue;
strValue >> intValue;

cout << value << endl;
cout << intValue << endl;