Convert std string to integer
Author
Hello!
I''m working with std::string and have the following problem: I want to convert a string with the value e.g. "16" to an integer and an integer to a std::string.
How to do that?
Thanks for every help!
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"If it looks good, it is good computer graphics"
"If it looks like computer graphics, it is bad computer graphics"
Corrail
corrail@gmx.at
ICQ#59184081
Hi
atoi() takes a const char* as an argument and returns an integer. So you would need to do:
You could also use stringstreams instead of atoi() to convert an std::string into an int, something like this
Which you would call as
Or you could use boost::lexical_cast from the boost library, see http://www.boost.org for that
[edited by - Jingo on November 13, 2003 8:38:46 AM]
atoi() takes a const char* as an argument and returns an integer. So you would need to do:
#include<cstdlib>int i = atoi(string.c_str()); //string is the std::stringYou could also use stringstreams instead of atoi() to convert an std::string into an int, something like this
template<typename RT, typename T, typename Trait, typename Alloc>RT ss_atoi( const std::basic_string<T, Trait, Alloc>& the_string ){ std::basic_istringstream< T, Trait, Alloc> temp_ss(the_string); RT num; temp_ss >> num; return num;}Which you would call as
int x = ss_atoi<int>(string); //string is the std::stringOr you could use boost::lexical_cast from the boost library, see http://www.boost.org for that
[edited by - Jingo on November 13, 2003 8:38:46 AM]
Author
Thanks!! I''ll try that!
--------------------------------------------------------
"If it looks good, it is good computer graphics"
"If it looks like computer graphics, it is bad computer graphics"
Corrail
corrail@gmx.at
ICQ#59184081
--------------------------------------------------------
"If it looks good, it is good computer graphics"
"If it looks like computer graphics, it is bad computer graphics"
Corrail
corrail@gmx.at
ICQ#59184081
This topic is closed to new replies.
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