Revision: 34288
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at October 20, 2010 14:32 by browny
Initial Code
#include <string>
#include <sstream>
#include <iostream>
template <class T>
bool from_string(T& t,
const std::string& s,
std::ios_base& (*f)(std::ios_base&))
{
std::istringstream iss(s);
return !(iss >> f >> t).fail();
}
int main()
{
int i;
float f;
// the third parameter of from_string() should be
// one of std::hex, std::dec or std::oct
if(from_string<int>(i, std::string("ff"), std::hex))
{
std::cout << i << std::endl;
}
else
{
std::cout << "from_string failed" << std::endl;
}
if(from_string<float>(f, std::string("123.456"), std::dec))
{
std::cout << f << std::endl;
}
else
{
std::cout << "from_string failed" << std::endl;
}
return 0;
}
Initial URL
http://www.codeguru.com/forum/showthread.php?t=231054
Initial Description
Initial Title
How to convert a string into a numeric type?
Initial Tags
convert
Initial Language
C++