#include <iostream>
#include <cstdio>
#include <vector>
std::vector<int> yes;
void view(void){
	std::cout << std::endl;
	std::cout << "size()=" << yes.size() << std::endl;
	std::cout << "max_size()=" << yes.max_size() << std::endl;
	std::cout << "capacity()=" << yes.capacity() << std::endl;
	std::cout << "element:";
	for(int i=0 ; i< yes.size() ; i++){
		std::cout << " " << yes[i];
	}
	std::cout << "\n\n";
}
int main(){
	puts("C++ vertor ¼ÒÀÀµ{¦¡\n");
	int in,a;
	bool verbose=true;
	while(1){
		printf("0 toggle verbose mode\n"
		       "1 push_back() - add an element\n"
			   "2 pop_back() - remove an element\n"
			   "3 reserve() - set the capacity of the vector to at least size\n"
			   "4 resize() - change the size of the vector\n"
			   "5 clear() - remove all elements\n"
			   "6 list current vector\n"
			   "7 free the memory - std::vector<int>().swap()\n"
			   "Select: ");
		scanf("%d",&in);
		fflush(stdin);
		switch(in){
			case 0:
				if(verbose){
					puts("Verbose mode now turn off.");
					verbose=false;
				}else{
					puts("Verbose mode now turn on.");
					verbose=true;
				}
				break;
			case 1:
				printf("Push what? ");
				scanf("%d",&a);
				yes.push_back(a);
				break;
			case 2:
				if(yes.empty()){
					puts("Cannot pop_back()");
				}else{
					yes.pop_back();
				}
				break;
			case 3:
				printf("Number: ");
				scanf("%d",&a);
				yes.reserve(a);
				break;
			case 4:
				printf("Number: ");
				scanf("%d",&a);
				yes.resize(a);
				break;
			case 5:
				yes.clear();
				break;
			case 6:
				view();
				break;
			case 7:
				std::vector<int>().swap(yes);
		}
		if(verbose && in!=6 && in!=0){
			puts("List current vector...");
			view();
		}
	}
	return 0;
}