Programming Forums > Application Development > C++

Kilo · May 22nd, 2006, 2:48 PM

I have tried atoi() but i get errors!

								s_numUp = itoa(atoi(Trim(tempParse)));

Error.

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1>c:\documents and settings\knowell\my documents\visual studio 2005\projects\sed\sed\sed.cpp(500) : error C2664: 'atoi' : cannot convert parameter 1 from 'std::string' to 'const char *'

Tegelane · May 22nd, 2006, 3:04 PM

you could use std::string.c_srtr() methon on the string to get a char*

or you could use stringstreams for converting

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#include <string>
#include <sstream>

#include "netstatus.h"

int makeint(const std::string& str) {
  std::stringstream ss;
  int tmp;
  ss<<str;
  ss>>tmp;
  return tmp;
}

Kilo · May 22nd, 2006, 3:43 PM

already fixed thanks! (i just didn't use anything)

Ooble · May 22nd, 2006, 5:55 PM

Bear in mind, for future reference, that itoa takes three parameters, not one, and does not return a string or a pointer to a character array. That said, string streams are more useful anyway.

May 22nd, 2006, 2:48 PM	#1
Kilo Expert Programmer Join Date: Nov 2005 Location: In Pink Clam? Posts: 542 Rep Power: 0	Parsing Int from String I have tried atoi() but i get errors! (Toggle Plain Text) s_numUp = itoa(atoi(Trim(tempParse))); s_numUp = itoa(atoi(Trim(tempParse))); Error. (Toggle Plain Text) 1>c:\documents and settings\knowell\my documents\visual studio 2005\projects\sed\sed\sed.cpp(500) : error C2664: 'atoi' : cannot convert parameter 1 from 'std::string' to 'const char ' 1>c:\documents and settings\knowell\my documents\visual studio 2005\projects\sed\sed\sed.cpp(500) : error C2664: 'atoi' : cannot convert parameter 1 from 'std::string' to 'const char ' __________________ "When in Rome, Do as the Romans Do" "Beauty is in the eye of the BEER holder" "Save your breath your going to need it for your blow up doll later" SearchLores.org

May 22nd, 2006, 3:04 PM	#2
Tegelane Newbie Join Date: May 2006 Location: Estonia Posts: 8 Rep Power: 0	you could use std::string.c_srtr() methon on the string to get a char* or you could use stringstreams for converting (Toggle Plain Text) #include <string> #include <sstream> #include "netstatus.h" int makeint(const std::string& str) { std::stringstream ss; int tmp; ss<<str; ss>>tmp; return tmp; } #include <string> #include <sstream> #include "netstatus.h" int makeint(const std::string& str) { std::stringstream ss; int tmp; ss<<str; ss>>tmp; return tmp; }

May 22nd, 2006, 3:43 PM	#3
Kilo Expert Programmer Join Date: Nov 2005 Location: In Pink Clam? Posts: 542 Rep Power: 0	already fixed thanks! (i just didn't use anything) __________________ "When in Rome, Do as the Romans Do" "Beauty is in the eye of the BEER holder" "Save your breath your going to need it for your blow up doll later" SearchLores.org

May 22nd, 2006, 5:55 PM	#4
Ooble I eat cake for breakfast. Join Date: Jul 2004 Location: In my box. Posts: 4,434 Rep Power: 9	Bear in mind, for future reference, that itoa takes three parameters, not one, and does not return a string or a pointer to a character array. That said, string streams are more useful anyway. __________________ Me :: You :: Them

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Programming Forums > Application Development > C++

Parsing Int from String