Converting argv to float

Hi

I have the following minimal non-working example:

Code:

---

#include <iostream>
#include <stdlib.h>
#include <stdio.h>

using namespace std;

int main(int argc, char* argv[])
{
    double b = strtod(argv[1], NULL);

    return 0;
}

---

I am trying to convert argv[1] to a double, but my example crashes when I run it. I don't really understand why. I am using code::blocks, does it have something to do with that?

Best,
Niles.

Check argc if enough parameters where passed to your executabe. Maybe argv[1] does not even exist? Also, if you don't have to use strtod, atof is a much easier function to handle.

The C++ way would probably be to write argv[1] to a stringstream and then read a double from it. But that's probably way over your head for now, check argc first :)