通过

vector::clear

  • 项目

清除向量的元素。

void clear( );

示例

// vector_clear.cpp
// compile with: /EHsc
#include <vector>
#include <iostream>
using namespace std;
int main( )
{
vector <int> vec;

    vec.push_back(10);
    vec.push_back(20);
    vec.push_back(30);

    cout << "The size of vec is " << vec.size() << endl;
    cout << "The capacity of vec is " << vec.capacity() << endl;
    vec.clear();
    cout << "The size of vec after clearing is " << vec.size() << endl;
    cout << "The capacity of vec after clearing is " << vec.capacity() << endl;}

要求

标头：<vector>

命名空间: std

请参见

参考

vector 类

标准模板库