标签：替换 c++ 指定元素 public 容器 algo space resize names
copy：容器中指定元素拷贝到另一容器中
replace：将容器内指定范围内的旧元素改为新元素
replace_if：容器内指定范围为满足条件的元素替换为新元素
swap：互换两个容器的元素
1.copy
#include<iostream> using namespace std; #include <vector> #include <algorithm> //常用拷贝和替换算法 copy void myPrint(int val) { cout << val << " "; } void test01() { vector<int>v1; for (int i = 0; i < 10; i++) { v1.push_back(i); } vector<int>v2; v2.resize(v1.size()); copy(v1.begin(), v1.end(), v2.begin()); for_each(v2.begin(), v2.end(), myPrint); cout << endl; } int main() { test01(); system("pause"); return 0; }
2.replace
#include<iostream> using namespace std; #include <vector> #include<algorithm> class MyPrint { public: void operator()(int val) { cout << val << " "; } }; //常用拷贝和替换算法 replace void test01() { vector<int>v; v.push_back(20); v.push_back(30); v.push_back(50); v.push_back(30); v.push_back(40); v.push_back(20); v.push_back(10); v.push_back(20); cout << "替换前：" << endl; for_each(v.begin(), v.end(), MyPrint()); cout << endl; //将20 替换 2000 replace(v.begin(), v.end(), 20, 2000); cout << "替换后：" << endl; for_each(v.begin(), v.end(), MyPrint()); cout << endl; } int main() { test01(); system("pause"); return 0; }
3.replace_if
#include<iostream> using namespace std; #include <vector> #include <algorithm> class MyPrint { public: void operator()(int val) { cout << val << " "; } }; class Greater30 { public: bool operator()(int val) { return val >= 30; } }; //常用拷贝和替换算法 replace_if void test01() { vector<int>v; v.push_back(10); v.push_back(40); v.push_back(20); v.push_back(40); v.push_back(30); v.push_back(50); v.push_back(20); v.push_back(30); cout << "替换前： " << endl; for_each(v.begin(), v.end(), MyPrint()); cout << endl; //将大于等于30 替换为 3000 replace_if(v.begin(), v.end(), Greater30(),3000); cout << "替换后： " << endl; for_each(v.begin(), v.end(), MyPrint()); cout << endl; } int main() { test01(); system("pause"); return 0; }
4.swap
#include<iostream> using namespace std; #include <vector> #include <algorithm> //常用拷贝和替换算法 swap void myPrint(int val) { cout << val << " "; } void test01() { vector<int>v1; vector<int>v2; for (int i = 0; i < 10; i++) { v1.push_back(i); v2.push_back(i+100); } cout << "交换前： " << endl; for_each(v1.begin(), v1.end(), myPrint); cout << endl; for_each(v2.begin(), v2.end(), myPrint); cout << endl; cout << "-----------------" << endl; cout << "交换后： " << endl; swap(v1, v2); for_each(v1.begin(), v1.end(), myPrint); cout << endl; for_each(v2.begin(), v2.end(), myPrint); cout << endl; } int main() { test01(); system("pause"); return 0; }
标签：替换 c++ 指定元素 public 容器 algo space resize names
原文地址：https://www.cnblogs.com/xiximayou/p/12114778.html
