Using strtod : convert from string « Data Types « C++ Tutorial

1. C++ Tutorial
2. Data Types
3. convert from string

#include <iostream>
using std::cout;
using std::endl;

#include <cstdlib>
using std::strtod;

int main()
{
   double d;
   const char *string1 = "51.2 are admitted";
   char *stringPtr;

   d = strtod( string1, &stringPtr );

   cout << d << endl;
   return 0;
}

51.2