//文件名:CHAPTER6-23.cpp
#include <vector>
#include <iostream>
int main()
{std::vector<int> c1, c2, c3, c4 ;
	int i ;
	for (i = 0; i < 10; i++)
	{	c1.push_back(i) ;
		c2.push_back(i*i) ;
		c3.push_back(i*i*i) ;
		c4.push_back(i) ;
	}
	if (c1 == c4) std::cout << "c1 == c4" << std::endl ;
	if (c2 != c3) std::cout << "c2 != c3" << std::endl ;
	if(c2 < c3) std::cout << "c2 < c3" << std::endl ;
	if(c3 > c2)	std::cout << "c3 > c2" << std::endl ;
	c4.push_back(29) ;
	if (c1 <= c4) std::cout << "after c4.push_back(29), c1 <= c4" << std::endl ;
	if (c3 >= c2) std::cout << "c3 >= c2" << std::endl ;
	std::swap(c3, c2) ;
	std::cout << "after swapping c3 with c2, " ;
	if (c3 >= c2)  std::cout << "c3 >= c2" << std::endl ;
	else std::cout << "c3 < c2" << std::endl ;
	return 0 ;
}