convert strings

[prog_tom]

anyone know how to convert strings into integers?

strings I meant not chars, I meants strings.

#include <string.h>

[crptcblade]

simple enough

#include <iostream>
#include <string>

using namespace std;

int main()
{
    string s = "1234";
    int    i = atoi(s.c_str());

    cout << i << endl;

    return 0;
} 

[SteveCRM]

just for future knowledge the opposite is itoa

[jim mcnamara]

Use the atoi() function.

[CornedBee]

_itoa is a non-standard extension of MS to the CRT. The C standard would be sprintf.

For C++, the standard method would be a stringstream:

#include <sstream>
#include <string> // no .h, this is old standard and deprecated
#include <iostream>
using namespace std;

int main()
{
  // int to string:
  ostringstream os;
  os << 1249 << " " << 2.34e12;
  string s = os.str();
  cout << s << endl;
  // string to int
  istringstream is(s);
  int i;
  double d;
  is >> i >> d;
  cout << i << " " << d << endl;
return 0;
}

Does this make you happy parksie?

[parksie]

Yep

string.h is deprecated in C++ in favour of <cstring>, which is identical apart from placing everything inside namespace std