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Parse integers from string?

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Parse integers from string?

Mar 6th, 2006

I was wondering if there is any way to parse integers from a string (like in java)? Anyone know of a built in function in c++?

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Re: Parse integers from string?

Mar 6th, 2006

stringstream

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Re: Parse integers from string?

Mar 11th, 2006

http://faq.cprogramming.com/cgi-bin/...&id=1043284385

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Re: Parse integers from string?

Mar 11th, 2006

atoi is a C function that works in C++.

e.g.:

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#include <iostream>
#include <cstdio>
#include <cstring>
 
int main() {
    char s[80];
    int i;
    cin>>s;
    i = atoi(s);
    cout>>i;
    return 0;
}
#include <iostream>
#include <cstdio>
#include <cstring>

int main() {
    char s[80];
    int i;
    cin>>s;
    i = atoi(s);
    cout>>i;
    return 0;
}

My C++ is a little rusty, but that's my example. Using the String class might be a little dirrerent.

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Re: Parse integers from string?

Mar 11th, 2006

You mean string (lowercase 's').

atoi() is a non-standard function; if you have it, it would be in <cstdlib>.

If you insist on using C functions, see this link: http://faq.cprogramming.com/cgi-bin/...&id=1043284385