C#语言学习--基础部分(十五)数组(1)
Console Demo
数组的两大特性:1.数组实例化完毕,定义下来数组元素的个数以后,数组元素的个数就不能再改变.2.数组中每一个元素所存储的数值必须都是相同的数据类型.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ArrayDemo
{
class Program
{
static void Main(string[] args)
{
int[] pins;
pins = new int[4]{7,3,4,7};
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ArrayDemo
{
class Program
{
static void Main(string[] args)
{
int[] pins;
pins = new int[4]{7,3,4,7};
//foreach (int s in pins)
//{
// Console.WriteLine(s);
//}
for(int x=0;x<pins.Length;x++)
{
Console.WriteLine(pins[x]);
}
Console.WriteLine(pins[0]); //数组的访问
Console.WriteLine(pins[1]);
Console.WriteLine(pins[2]);
Console.WriteLine(pins[3]);
//pins = new int[3] { 7, 3, 4, 7 };//初始化长度不对应
//pins = new int[4] { 7, 3, 4 }; //初始化长度不对应
//int[] pins2;
//int i =int.Parse( Console.ReadLine());//动态指字数组维数
//pins2 = new int[i];
int[] pins3 = { 9, 3, 7, 2 }; //编译器会默认认为数组元素的个数为4
//隐式数组类型
var names = new[] { "aa", "bb" };
foreach (var name in names)
{
Console.WriteLine(name);
}
//var bad = new[] { "aa", "bb", 1, 2 };
var numbers = new[] { 11, 22, 33, 33.33, 45.35,23.9999999 };//double类型
Console.WriteLine(numbers[numbers.Length -1]);
//数组copy
int []pins4=new int[]{7,3,5,2};
int[] pins5;
pins5 = pins4; //此种赋值方式并不是把pins4数组里面每个元素都copy一份到pins5,这种赋值操作其实是把pins4这种整型数组的引用类型保存的地址copy到pins5中.
foreach (int pin in pins5)
{
Console.WriteLine(pin);
}
pins4[1] = 100;
Console.WriteLine(pins5[1]);
}
}
}
//{
// Console.WriteLine(s);
//}
for(int x=0;x<pins.Length;x++)
{
Console.WriteLine(pins[x]);
}
Console.WriteLine(pins[0]); //数组的访问
Console.WriteLine(pins[1]);
Console.WriteLine(pins[2]);
Console.WriteLine(pins[3]);
//pins = new int[3] { 7, 3, 4, 7 };//初始化长度不对应
//pins = new int[4] { 7, 3, 4 }; //初始化长度不对应
//int[] pins2;
//int i =int.Parse( Console.ReadLine());//动态指字数组维数
//pins2 = new int[i];
int[] pins3 = { 9, 3, 7, 2 }; //编译器会默认认为数组元素的个数为4
//隐式数组类型
var names = new[] { "aa", "bb" };
foreach (var name in names)
{
Console.WriteLine(name);
}
//var bad = new[] { "aa", "bb", 1, 2 };
var numbers = new[] { 11, 22, 33, 33.33, 45.35,23.9999999 };//double类型
Console.WriteLine(numbers[numbers.Length -1]);
//数组copy
int []pins4=new int[]{7,3,5,2};
int[] pins5;
pins5 = pins4; //此种赋值方式并不是把pins4数组里面每个元素都copy一份到pins5,这种赋值操作其实是把pins4这种整型数组的引用类型保存的地址copy到pins5中.
foreach (int pin in pins5)
{
Console.WriteLine(pin);
}
pins4[1] = 100;
Console.WriteLine(pins5[1]);
}
}
}