string to float conversion?

Question

I\'m wondering what sort of algorithm could be used to take something like \"4.72\" into a float data type, equal to

float x = 4.72;

Answer 1

From cplusplus.com: "stringstream provides an interface to manipulate strings as if they were input/output streams."

You can initialize a stringstream with your string then read a float from the stringstream using operator>> just like you would with cin.

Here is an example:

#include
#include
#include
using namespace std;

int main() {
  string s = "4.72";
  stringstream sstrm(s);
  float x;
  sstrm >> x;
  cout << x << endl;
}