vector容器05之赋值操作

2021-03-02 16:58:23 浏览数 (1)

赋值操作

函数原型:

代码语言:javascript复制
#include<iostream>
using namespace std;
#include<vector>
//vector赋值操作
void print(vector<int>& v)
{
	for (vector<int>::iterator beg = v.begin(); beg != v.end(); beg  )
	{
		cout << *beg <<" ";
	}
	cout << endl;
}
void test()
{
	vector<int> v;
	v.push_back(1);
	v.push_back(2);
	v.push_back(3);
	print(v);
	//1.重载等号运算符  operator=
	vector<int> v1;
	v1 = v;
	print(v1);
	//2.[beg,end)区间赋值拷贝给本身
	vector<int> v2;
	v2.assign(v1.begin(), v1.end());
	print(v2);
	//3.将n个elem拷贝赋值给本身
	vector<int> v3;
	v3.assign(5, 20);
	print(v3);
}
int main()
{
	test();
	system("pause");
	return 0;
}

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