Java-枚举自定义类实现枚举package cn.meowrain.enum_;public class Enumeration02 { public static void main(String[] args) { System.out.println(Season.spr

Object类详解equals方法== 是一个比较运算符区分package com.hsp.object;public class Equals_exercise02 { public static void main(String[] args) { String name_1

Java-super关键字基本介绍super代表父类的引用，用于访问父类的属性，方法和构造器基本语法访问父类的属性，但不能访问父类的private属性​super.属性名A类package com.hsp.extend._super;public class A { public int n1

Java 访问修饰符

struct.cpp#include <iostream>using namespace std;struct inflatable{ string name; int age; float weight;};struct new_struct{ string n

#include <stdio.h>const int N = 1000000;char ch[N];int main(){ gets(ch); int count[127]={0}; for(int i=0; ch[i]; i++) count[ch[i]]++;

//字符串长度#include <iostream>#include <string>using namespace std;int main(){ string str; getline(cin, str); int len = str.length();

#include <cstdio>int main(void) { for(int i = 1;i<=9;i++){ for(int j = 1;j<=i;j++){ printf("%d x %d = %d ",

#include <cstdio>int main(void) { for(int i = 1;i<=4;i++){ for(int j = 1;j<=4-i;j++){ printf(" "); }

数组的插入#include <iostream>using namespace std;int main(void) { char arr[5] = {'a','b','c','d','e'};