using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace student_number
{
class Program
{
static void Main(string[] args)
{
int[] height = new int[10] {156,150,167,178,180,176,173,154,155,158};
int i, sumHeight = 0, avgHeight, maxHeight = 0, minHeight = 500, overAvg = 0;
Console.WriteLine("學(xué)生身高如下：");
//顯示數(shù)組內(nèi)容
for (i = 0; i < 10; i++)
{
Console.Write("{0,4}",height[i]);
}
//求身高總和荆针，最大值，最小值
for (i = 0; i < 10; i++)
{
sumHeight += height[i];
if (height[i] > maxHeight) maxHeight = height[i];
if (height[i] < minHeight) minHeight = height[i];
}
avgHeight = sumHeight / 10;
for (i = 0; i < 10; i++)
{
if (height[i] > avgHeight) overAvg++;
}
Console.WriteLine("\n平均身高={0}喉悴，最高身高={1}玖媚，最低身高={2}", avgHeight, maxHeight, minHeight);
Console.WriteLine("高于平均身高的學(xué)生人數(shù)={0}", overAvg);
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace student_score
{
class Program
{
static void Main(string[] args)
{
int[] score = new int[10] {80,90,67,89,78,85,45,69,77,95};
int i, ANum = 0, BNum = 0, CNum = 0, DNum = 0;
Console.WriteLine("學(xué)生成績(jī)?nèi)缦拢?);
for (i = 0; i < 10; i++) Console.Write("{0,4}",score[i]);
//求成績(jī)總和
for (i = 0; i < 10; i++)
{
switch (score[i] / 10)
{
case 10:
case 9:
ANum++;
break;
case 8:
BNum++;
break;
case 7:
case 6:
CNum++;
break;
default:
DNum++;
break;
}
}
Console.WriteLine("\n優(yōu)分?jǐn)?shù)段（90~100）的學(xué)生人數(shù)是={0}勺像，所占百分比={1:#0.##%}",ANum,ANum/10.0);
Console.WriteLine("良分?jǐn)?shù)段（80~90）的學(xué)生人數(shù)是={0}错森，所占百分比={1:#0.##%}", BNum, BNum / 10.0);
Console.WriteLine("中分?jǐn)?shù)段（70~80）的學(xué)生人數(shù)是={0}，所占百分比={1:#0.##%}", CNum, CNum / 10.0);
Console.WriteLine("差分?jǐn)?shù)段（60~70）的學(xué)生人數(shù)是={0}殃姓，所占百分比={1:#0.##%}", DNum, DNum / 10.0);
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace 冒泡排序
{
class Program
{
public static void DisplayMatrix(int[] A)
{
//打印矩陣
foreach(int i in A) Console.Write("{0,4}",i);
Console.WriteLine();
}
static void Main(string[] args)
{
int i, t;
int[] A = new int[10];
Random rNum = new Random();
for (i = 0; i < A.Length; i++) A[i] = rNum.Next(101);
//數(shù)組A賦值隨機(jī)數(shù)
Console.WriteLine("原始數(shù)組：");
DisplayMatrix(A);
//冒泡排序
int N = A.Length;
for (int loop = 1; loop <= N - 1; loop++)//外循環(huán)進(jìn)行N-1輪比較
{
for (i = 0; i <= N - 1 - loop; i++)//內(nèi)循環(huán)兩兩比較
{
if(A[i] < A[i+1])
{
t = A[i];
A[i] = A[i + 1];
A[i + 1] = t;
}
}
}
Console.WriteLine("降序數(shù)組：");
DisplayMatrix(A);
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace 選擇排序
{
class Program
{
public static void DisplayMatrix(int[] A)
{
//打印矩陣
foreach (int i in A) Console.Write("{0,4}", i);
Console.WriteLine();
}
static void Main(string[] args)
{
int i, t,MaxI;
int[] A = new int[10];
Random rNum = new Random();
for (i = 0; i < A.Length; i++) A[i] = rNum.Next(101);
//數(shù)組A賦值隨機(jī)數(shù)
Console.WriteLine("原始數(shù)組：");
DisplayMatrix(A);
//選擇排序
int N = A.Length;
for (int loop = 0; loop <= N - 2; loop++)//外循環(huán)進(jìn)行N-1輪比較
{
MaxI = loop;
for (i = loop; i <= N - 1; i++)//內(nèi)循環(huán)在無(wú)序數(shù)中找到最大值
{
if (A[i] > A[MaxI]) MaxI = i;
}
t = A[loop];
A[loop] = A[MaxI];
A[MaxI] = t;
}
Console.WriteLine("降序數(shù)組：");
DisplayMatrix(A);
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace 矩陣加減
{
class Program
{
public static void DisplayMatrix(int[,] A)
{
//打印矩陣
for (int i = 0; i < A.GetLength(0); i++)
for (int j = 0; j < A.GetLength(1); j++)
Console.Write("{0,4}",A[i,j]);
Console.WriteLine();
}
static void Main(string[] args)
{
int i, j;
int[,] A = new int[4, 4];
int[,] B = new int[4, 4];
int[,] C = new int[4, 4];
int[,] D = new int[4, 4];
Random rNum = new Random();
for (i = 0; i < 4; i++)
for (j = 0; j < 4; j++)
A[i, j] = rNum.Next(10,101);
Console.WriteLine("數(shù)組A的內(nèi)容："); DisplayMatrix(A);
for (i = 0; i < 4; i++)
for (j = 0; j < 4; j++)
B[i, j] = rNum.Next(10, 101);
Console.WriteLine("數(shù)組A的內(nèi)容："); DisplayMatrix(B);
Console.WriteLine("上三角形式顯示數(shù)組A的內(nèi)容：");
for (i = 0; i < 4; i++)
{
for (int k = 0; k < i * 5; k++) Console.Write(" ");
for (j = i; j < 4; j++)
Console.Write("{0,4}",A[i,j]);
Console.WriteLine();
}
Console.WriteLine("下三角形式顯示數(shù)組A的內(nèi)容：");
for (i = 0; i < 4; i++)
{
for (j = 0; j < i+1; j++)
Console.Write("{0,4}", B[i, j]);
Console.WriteLine();
}
for (i = 0; i < 4; i++)
for (j = 0; j < 4;j++ )
C[i, j] = A[i, j] + B[i, j];
Console.WriteLine("數(shù)組A和數(shù)組B的相加之和：");
DisplayMatrix(C);
for (i = 0; i < 4; i++)
for (j = 0; j < 4; j++)
D[i, j] = A[i, j] - B[i, j];
Console.WriteLine("數(shù)組A和數(shù)組B的相減之差：");
DisplayMatrix(D);
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace 楊輝三角
{
class Program
{
static void Main(string[] args)
{
int[,] A = new int[10,10];
int i, j;
for (i = 0; i < 10; i++)
for (j = 0; j < 10; j++)
A[i, j] = 1;
for (i = 0; i < 10; i++)
for (j = 1; j < i; j++)
{
A[i,j] = A[i-1,j] + A[i-1,j-1];
}
for (i = 0; i < 10; i++)
{
for (j = 0; j <= i; j++)
Console.Write("{0,5}",A[i,j]);
Console.WriteLine();
}
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace System.Array類
{
class Program
{
static void Main(string[] args)
{
int i;
int[] A = {80,90,67,89,78,85,45,69,77,95};
Console.WriteLine("數(shù)組A的維數(shù)（秩rank）：{0}",A.Rank);
Console.WriteLine("數(shù)組A的長(zhǎng)度（元素總數(shù)）：{0}", A.Length);
Console.WriteLine("數(shù)組A的內(nèi)容：");
//A.Length == A.GetLength(0);
for (i = 0; i < A.GetLength(0); i++) Console.Write("{0,4}",A[i]);
Array.Sort(A);
Console.WriteLine("\n數(shù)組A排序后的內(nèi)容：");
for(i = 0;i < A.Length;i++) Console.Write("{0,4}",A[i]);
Array.Reverse(A);
Console.WriteLine("\n數(shù)組A排序反轉(zhuǎn)后后的內(nèi)容：");
for (i = 0; i < A.Length; i++) Console.Write("{0,4}",A[i]);
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace 指針操作
{
unsafe class Program
{
public static void swap(int* pa, int* pb)
{
int t;
t = *pa;
*pa = *pb;
*pb = t;
}
static void Main(string[] args)
{
int a, b, c;
int* pa, pb, pc;
Console.Write("請(qǐng)輸入整數(shù)a：");
string s = Console.ReadLine();
a = int.Parse(s);
Console.Write("請(qǐng)輸入整數(shù)b：");
s = Console.ReadLine();
b = int.Parse(s);
Console.Write("請(qǐng)輸入整數(shù)c：");
s = Console.ReadLine();
c = int.Parse(s);
Console.WriteLine("原始數(shù)據(jù)：a={0},b={1},c={2}", a, b, c);
pa = &a; pb = &b; pc = &c;
if (*pa > *pb) swap(pa, pb);
if (*pa > *pc) swap(pa, pc);
if (*pb > *pc) swap(pb, pc);
Console.WriteLine("升序排序：a={0},b={1},c={2}", a, b, c);
}
}
}
