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assert：根据判断条件，如果不满足则抛出异常，但仅限于Debug模式try, catch：Debug模式和Release模式均可。try, catch详细用法:https://blog.youkuaiyun.com/qq_40191710/article/details/81063878 https://www.jb51.net/article/80913.htm更新一下上面链接的代码 :-)C++的异常处理的基本思想大致可以概括为传统...

template<typename T>void selection_sort(vector<T>& a) { for (int i = 0; i < a.size() - 1; i++) { int min = i; for (int j = i + 1; j < a.size(); j++) if (a[j] < a[min]) min = j; swap(a[i], a[min]); }}template<.

虚函数是动态联编的eg1：class A{public: virtual void foo() { cout << "A::foo() is called" << endl; }};class B :public A{public: void foo() { cout << "B::foo() is called" << endl; }};int main(void){ A *a = new B(); a-.

vector<int> a = { 1,2,3}; vector<int>::iterator it = a.begin(); a.erase(it,it+2);//擦除a从it开始的两个元素，结果a = {3} vector<int> a = { 1,2,3}; vector<int>::iterator it = a.begi...

//一维数组int *test1;test1 = new int[5]; //二维数组int **test2;test2 = new int *[row];int row = 4, col = 5;for (int i = 0; i < row; i++){ test2[i] = new int[col];}

namespace Jill{ double bucket(double n) { return 0; }; double fetch; int pal; struct Hill {};}char fetch;int main(){ using Jill::fetch; double fetch //error！重定义; std::cin >> fetch;/...

下面代码读文件的时候，注意会读回车。#include<iostream>#include<algorithm>#include <direct.h>#include<fstream>using namespace std;int a[1005];int b[1005];int main(){ /*char buf1[...

#include<iostream>#include<set>#include<string>#include<sstream>#include<vector>#include<algorithm>#include<string>using namespace std;;void threeSum...

#include <vector>#include <algorithm>#include <iostream>#include <Eigen/Dense>using namespace std;using namespace Eigen;int main(){ Matrix3d A; A << 1, 1, 1,...

#include<fstream>#include<iostream>using namespace std;int main(){ // *************************写txt文件******************************* //ofstream OutFile; //实例一个写文件...

#include <stdio.h>#include <stdlib.h>#include <string.h>#include<iostream>using namespace std;int main(){ const char *s; char str[] = "C:\\Users\\Administrator.DESKTOP...

当char c = 0执行时，0是作为int类型赋给c，所以c对应的应该是ASCII值为0符号（空格），当然c==0是成立的,c=='0'不成立。#include <iostream>using namespace std;int main(){ char c = 0; if (c == 0) cout << "c==0...

将int &p1 = x, &p2 = y;fun1(p1, p2);替换为fun1(x,y);输出结果一样，表明调用含引用传递的函数时，参数前的 & 可以省略#include <iostream>using namespace std;int main(){ void fun(int x, int y); void fun1(i...