c 2b 2b changing string to double

1#include <iostream>
2using namespace std;
3int main() {
4   char s[20] = "18.2894 is a number";
5   char *p;
6   double result;
7   result = strtod(s, &p);
8   cout<<"The number after conversion of string : "<<result;
9   return(0);
10}