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黑马248

#include #include #include #include using namespace std; //统计内置数据类型 void test01() { vectorv; for (int i = 0; i < 20; i++) { v.push_back(i); } v.push_back(2); v.push_back(1); v.push_back(3); int num = count(v.begin(), v.end(),1); cout << “1出现的次数” << num; } class person { public: person(string name,int age) { m_name = name; m_age = age; } bool operator==(const person &p) { if (p.m_age == this->m_age) { return true; } else { return false; } } string m_name; int m_age; }; //自定义数据类型 void test02() { vectorv; person p1(“aa”, 10); person p2(“bb”, 20); person p3(“cc”, 30); person p4(“dd”, 30); person p5(“ee”, 20);

person p("pp", 30);v.push_back(p1);v.push_back(p2);v.push_back(p3);v.push_back(p4);v.push_back(p5);v.push_back(p);int num = count(v.begin(), v.end(), p);cout << "和pp岁数相同的人的个数：" << num << endl;

}

int main() { test02(); }

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