Converting a string into an integer parameter [duplicate]

Question

Possible Duplicates:
How to convert a number to string and vice versa in C++
c++ - convert pointer string to integer

Is there a way to convert a string into an integer parameter without any big algorithms?

string = "100";

integerFunction(int string);

I've tried atoi functions and tried to manually convert each number over with the string[count] - 48 way but it needs to be in a way where the number of digits don't become a problem with this. Any suggestions or algorithms out there that can help? I really appreciate it.

Why would the number of digits be a problem?

Hasturkun
– Hasturkun

2011-07-16 19:50:17 +00:00
Commented Jul 16, 2011 at 19:50 — Hasturkun
– Hasturkun, Commented Jul 16, 2011 at 19:50

BЈовић · Accepted Answer · 2011-07-17 11:02:37Z

0

Like this:

int StringToInt( const std::string & str )
{
  std::stringstream ss(str);
  int res = 0;
  ss >> res;
  return res
}

edited Jul 17, 2011 at 11:02

answered Jul 16, 2011 at 19:51

BЈовић

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2 Comments

Jesus Ramos Over a year ago

Why not use the stringstream constructor :P std::stringstream ss(str);

Ben Voigt Over a year ago

What advantage does this have over calling strtol, exactly?

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