一篇文章带你了解C++(STL基础、Vector)

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vector<int>::iterator Begin = v.begin();

vector<int>::iterator End = v.end();

while(Begin != End) {

cout << *Begin << endl;

Begin++;

}

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for(vector<int>::iterator it = v.begin(); it != v.end(); it++) {

cout << *it << endl;

}

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#include <algorithm>

voidmyPrintln(intval) {

cout << val << endl;

}

for_each(v.begin(), v.end(), myPrintln);

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voidtest13() {

vector<Person> v1;

Person p1("花丸",16);

Person p2("善子", 17);

Person p3("露比", 15);

v1.push_back(p1);

v1.push_back(p2);

v1.push_back(p3);

for(vector<Person>::iterator it = v1.begin(); it != v1.end(); it++) {// *it 就是 Vector<> 内的

cout << (*it).m_Name <<" "<< (*it).m_Age << endl;

}

}

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voidtest14() {

vector<Person*> v2;

Person p1("小花丸", 16);

Person p2("中善子", 17);

Person p3("大露比", 15);

v2.push_back(&p1);

v2.push_back(&p2);

v2.push_back(&p3);

for(vector<Person*>::iterator it = v2.begin(); it != v2.end(); it++) {

cout << (*it)->m_Name <<" "<< (*it)->m_Age << endl;

}

}

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#include <iostream>

usingnamespacestd;

#include <string>

#include <algorithm>

#include <vector>

// 知识点 ： Vector 嵌套 类似于多维数组

voidtest15() {

vector<vector<int>> v;

vector<int> v1;

vector<int> v2;

vector<int> v3;

for(inti = 0; i < 4; i++) {

v1.push_back(i + 1);

v2.push_back(i + 3);

v3.push_back(i + 5);

}

v.push_back(v1);

v.push_back(v2);

v.push_back(v3);

for(vector<vector<int>>::iterator it = v.begin(); it != v.end(); it++) {

// *it - > vector<int>

for(vector<int>::iterator vit = (*it).begin(); vit != (*it).end(); vit++) {

cout << *vit <<" ";

}

cout << endl;

}

}

intmain() {

test15();

system("pause");

return0;

}