Please help with atoi()

Expand Post »

i'm trying to convert a string into an integer by using atoi() function. but it gives me an error:
error C2664: 'atoi' : cannot convert parameter 1 from 'class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >' to 'const char *'
No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called

i've looked up how to use atoi() and i'm positive i'm using it right can someone offer some insight?

C Syntax (Toggle Plain Text)
string b;
//b is given a value inbetween these two commands by way of
//a loop.
tree.Insert(atoi(b));
string b;
//b is given a value inbetween these two commands by way of
//a loop.
tree.Insert(atoi(b));

thanks for any help

Similar Threads

help me about atoi in C++
The Calculator in C++
Cubing Digits Individually in C++
MS Visual++ 6.0 - Error C2146, C2501 ... in C++
ASCII to BINARY, & VICA VERCA in C++

LordJayno

Reputation Points: 10

Solved Threads: 0

Newbie Poster

Offline

6 posts
since Oct 2005

Permalink

Nov 14th, 2005

Re: Please help with atoi()

atoi needs a pointer to a C-style string.

C Syntax (Toggle Plain Text)
tree.Insert(atoi(b.c_str()));
tree.Insert(atoi(b.c_str()));

Dave Sinkula

Team Colleague

Reputation Points: 2780

Solved Threads: 312

long time no c

Offline

4,790 posts
since Apr 2004

Permalink

Nov 14th, 2005

Re: Please help with atoi()

thanks that worked great.

LordJayno

Reputation Points: 10

Solved Threads: 0

Newbie Poster

Offline

6 posts
since Oct 2005

This thread is more than three months old

No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.

Previous Thread in C Forum Timeline: Storing data into an Array

Next Thread in C Forum Timeline: Client vs Window

DaniWeb Message

Cancel Changes

User Name
Password