include "stdafx.h"
#include
#include
#include
#include
#include
#include
#include
bool compareNature(const std::string& a, const std::string& b)
{
if (a.empty())
return true;
if (b.empty())
return false;
if (std::isdigit(a[0]) && !std::isdigit(b[0]))
return true;
if (!std::isdigit(a[0]) && std::isdigit(b[0]))
return false;
if (!std::isdigit(a[0]) && !std::isdigit(b[0]))
{
if (std::toupper(a[0]) == std::toupper(b[0]))
return compareNature(a.substr(1), b.substr(1));
return (std::toupper(a[0]) < std::toupper(b[0]));
}
// Both strings begin with digit --> parse both numbers
std::istringstream issa(a);
std::istringstream issb(b);
int ia, ib;
issa >> ia;
issb >> ib;
if (ia != ib)
return ia < ib;
// Numbers are the same --> remove numbers and recurse
std::string anew, bnew;
std::getline(issa, anew);
std::getline(issb, bnew);
return (compareNature(anew, bnew));
}
int main()
{
std::vector
str.push_back("1#F1");
str.push_back("1#2");
str.push_back("1#3");
str.push_back("1#F10");
str.push_back("1#F12");
str.push_back("1#F15t");
str.push_back("1#11");
std::sort(str.begin(), str.end(), compareNature);
std::copy(str.begin(), str.end(),
std::ostream_iterator
system("pause");
return 0;
}