<C#任务导引教程>练习五

//27，创建一个控制台应用程序，声明两个DateTime类型的变量dt，获取系统的当前日期时间，然后使用Format格式化进行规范
using System;
class Program
{
static void Main()
{
DateTime dt = DateTime.Now;
string strDate = String.Format("{0:D}", dt);
Console.WriteLine("今天的日期是:" + strDate);
}
}
//28,创建一个控制台应用程序，声明一个string类型变量str1，并初始化为“我钟爱C#语言程序设计”,然后用copy方法复制字符串str1，并赋值给字符串str2，最后输出字符串str2
using System;
class Program
{
static void Main()
{
string str1 = "我钟爱C#语言程序设计";
string str2;
str2 = string.Copy(str1);
Console.WriteLine(str2);
}
}
//29,CopTo方法
using System;
class Program
{
static void Main()
{
string str = "我钟爱C#语言程序设计";
Console.WriteLine("原字符串:\n" + str);
char[] myChar = new char[5];
str.CopyTo(0, myChar, 0, 5);//CopyTo（int需要复制的字符的起始位置，cha[]目标字符数名，指定目标数组中的开始存放位置，int指定要复制的字符个数）
Console.WriteLine("复制的字符串:");
Console.WriteLine(myChar);
}
}

我可以给你们大概算一下有多少个模块 就单纯说些代码的 硬件部门不算
构成设定CLI ，装置维护CLI，环境设定CLI，装置信息查看CLI.快照备份CLI，数据分割CLI，资源分割CLI，性能优化CLI。。。

server， mainserver 设定server，状态监视server，性能监视server，snapshotserver，备份还原server......

还有各种外部tools，还不算OS部门和FW部门

//30,字符串的加密与解密示例
using System;
class Program
{
static void Main()
{
string list = "kczutmhsuasasahsuihsuw";
char[] str = new char[80];
int i, j;
Console.Write("请输入一小写字母串（长度小于80）:");
string c = Console.ReadLine();
Console.Write("加密后成为:");
for (i = 0; i < c.Length; i++)
{
str[i] = c[i];
j = str[i] - 97;
str[i] = list[j];
Console.Write("{0}", str[i]);
}
Console.WriteLine();
}
}
//31,字符串的解密示例
using System;
class Program
{
static void Main()
{
string list = "qwertyuioplkjhgfdsazxcvbnm";
char[ ] str = new char[80];
int i, j;
Console.Write("请输入需解密的字符串:");
string c = Console.ReadLine();
Console.Write("原字符串是:");
for (i = 0; i < c.Length; i++)
{
str[i] = c[i];//
j = 0;
while (str[i] != list[j])
j++;
str[i] = (char)(j + 97);
Console.Write("{0}",str[i]);
}
Console.WriteLine();
}
}
//32，有三个字符串，要求找出其中最大者
using System;
class Program
{
static void Main()
{
Console.WriteLine("请先后输入三个字符串,每输入一个请按Enter键确认!");
string str;
Console.Write("请输入第1个字符串:");
string a = Console.ReadLine();
Console.Write("请输入第2个字符串:");
string b = Console.ReadLine();
Console.Write("请输入第3个字符串:");
string c = Console.ReadLine();
int m = String.Compare(a, b);
if (m > 0)
str = String.Copy(a);
else
str = String.Copy(b);
int n = String.Compare(c, str);
if (n > 0)
str = String.Copy(c);
Console.WriteLine("最大的字符串是:{0}", str);
}
}
//33,选择排序
using System;
class Program
{
static void Main()
{
string[ ] names = new string[5];
string max;
int i, j;
for(i=0;i<5;i++)
{
Console.Write("请输入{0}个国家的名字:",i+1);
names[i] = Console.ReadLine( );
}
for (i = 0; i < names.Length - 1; i++)
{
for(j=i+1;j<names.Length;j++)
{
int m = String.Compare(names[i], names[j]);
if (m < 0)
{
max = String.Copy(names[i]);
names[i] = String.Copy(names[j]);
names[j] = String.Copy(max);
}
}
}
Console.WriteLine("排序结果:");
for (i = 0; i < 5; i++)
{
Console.Write("{0} ", names[i]);
}
Console.WriteLine();
}
}
//34.ArrayList数组集合
using System;
using System.Collections;//ArrayList位于Collections中
class Program
{
static void Main()
{
ArrayList myAL = new ArrayList( );
myAL.Add("Hello");
myAL.Add("World");
myAL.Add("!");
Console.WriteLine("myAL Count: {0}", myAL.Count);//显示ArrayList的元素个数
Console.Write(" Value:");
foreach (Object obj in myAL)
Console.Write(" {0}", obj);
Console.WriteLine();
}
}
//35,输出一个表格的表头，调用方法
using System;
class Program{
static void printstar()
{
Console.WriteLine("*************");
}
static void print_message()
{
Console.WriteLine("* XSCJFXTJB *");
}
static void Main()
{
printstar();
print_message();
printstar();
}
}
//36，方法返回值，return语句的一半格式
using System;
class MainClass
{
static int power(int x, int n)
{
int pow = 1;
while (n > 0)
{
n--;
pow *= x;
}
return pow;
}
static void Main()
{
int n = 3;
int x = 4;
char c = 'a';
Console.WriteLine("power({0},{1},{2})", x, n, power(x, n));
Console.WriteLine("power('{0}',{1})={2}", c, n, power(c, n));
Console.WriteLine("power({0},{1}))={2}", n,x, power(n,x));
}
}
//37,输入两个整数，通过方法的调用输出其中较大的数，求两个整数中的较大数，用方法完成
using System;
class Program
{
static int max(int x, int y)
{
return (x >= y) ? x : y;
}
static void Main()
{
Console.WriteLine("请输入两个整数:");
Console.Write("a= ");
int a = Convert.ToInt32(Console.ReadLine());
Console.Write("b= ");
int b=Convert.ToInt32(Console.ReadLine());
Console.WriteLine("{0:D}和{1:D}较大的数是:{2:D}",a,b,max(a,b));
}
}
//38,试编程实现方法的嵌套调用
using System;
class Program
{
static void prnline( )
{
Console.Write(" - ");
}
static void print()
{
Console.Write(" * ");
prnline();
return;
}
static void Main()
{
int i, j;
for (i = 0; i < 2; i++)
{
for (j = 0; j < 3; j++)
{
print();
}
Console.WriteLine( );
}
}
}
//39,阶乘
using System;
class MainClass
{
static int fac(int n)
{
int y;
if (n == 1)
y = 1;
else
y = n * fac(n - 1);
return y;
}
static void Main()
{
Console.WriteLine("4！={0}",fac(4));
}
}
//40,n+n^2+n^3+---n^n
//n(1+n(1+n(1+n----)))
using System;
class MainClass
{
static int fun(int n, int m)
{
if (m == 1)
return n;
else
return n * (1 + fun(n, m - 1));
}
static void Main()
{
Console.WriteLine("n=1:{0}", fun(1, 10));
Console.WriteLine("n=2:{0}", fun(2, 10));
Console.WriteLine("n=3:{0}", fun(3, 10));
}

}
//41，汉诺塔问题
using System;
class Program
{
static void hanoi(int n, char A, char B, char C)
{
if (n == 1)
Console.WriteLine("将第{0}个盘子从{1}柱搬到{2}柱上;", n, A, C);
else
{
hanoi(n-1,A,C,B);
Console.WriteLine("将第{0}个盘子从{1}柱搬到{2}柱上",n,A,C);
hanoi(n-1,B,A,C);
}
}
static void Main()
{
char A = 'A', B = 'B', C = 'C';
Console.WriteLine("请输入A柱上的盘子总数:");
int n = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("当A柱上有{0}个盘子时，移动步骤依次为:", n);
hanoi(n, A, B, C);
}
}
//42,引用参数ref使用示例
using System;
class Program
{
static void Swap(ref int x, ref int y)
{
int temp = x;
x = y;
y = temp;
}
static void Main()
{
int i = 1, j = 2;
Swap(ref i,ref j);
Console.WriteLine("i={0},j={1}", i, j);
}
}
//43,输出参数out使用示例
using System;
class Program
{
static void Divide(int x, int y, out int result, out int reminder)
{
result = x / y;
reminder = x % y;
}
static void Main()
{
int res, rem;
Divide(10, 3, out res, out rem);
Console.WriteLine("res={0} rem={1}", res, rem);
}
}
//44.用引用参数ref实现对8名学生各两门成绩的统计，求每门成绩的最低分
using System;
class Program
{
static void Main()
{
int[,] score = { { 98, 82 },{80,76}, { 96, 80 }, { 88, 90 }, { 98, 87 }, { 75, 84 }, { 68, 92 }, { 83, 66 } };
int min1 = score[0, 0];
int min2 = score[0, 1];
minmum(score, ref min1, ref min2);
Console.WriteLine("课程1最低分:" + min1 + "\n课程2最低分" + min2);
}
static void minmum(int[,] score, ref int min1, ref int min2)
{
for (int i = 1; i < score.GetLength(0); i++)
if (score[i, 0] < min1)
min1 = score[i, 0];
for (int i = 1; i < score.GetLength(0); i++)
if (score[i, 1] < min2)
min2 = score[i,1];
}
}
//45,用输出参数out实现对8名学生各两门成绩的统计，求每门的最高分
using System;
class Program
{
static void Main()
{
int[ , ]score={{98,82},{80,76},{96,80},{88,90},{98,87},{75,84},{68,92},{83,66}};
int max1, max2;
maxmum(score, out max1, out max2);
Console.WriteLine("课程1最高分:" + max1 + "\n课程2最高分:" + max2);
}
static void maxmum(int[,] score, out int max1, out int max2)
{
max1 = score[0, 0];
max2 = score[0, 1];
for (int i = 1; i < score.GetLength(0); i++)
if (score[i, 0] > max1)
max1 = score[i, 0];
for (int i = 1; i < score.GetLength(0); i++)
{
if (score[i, 1] > max2)
max2 = score[i, 1];
}
}
}
//46,定义了3个学生代表，每个学生4次测试成绩对应一个3x4的数组，求所以学生各次考试成绩中的最高成绩
using System;
class Program
{
static void Main()
{
int[,] s = new int[3, 4] { { 68, 77, 73, 86 }, { 87, 96, 78, 89 }, { 90, 70, 81, 86 } };
Console.WriteLine("最高成绩是:{0}", max(s, 3, 4));
}
static int max(int[,] g, int p, int t)
{
int m = 0;
for(int i=0;i<p;i++)
for(int j=0;j<t;j++)
if(g[i,j]>m)
m=g[i,j];
return m;
}
}
//47，输出双精度示例
using System;
class Program
{
static void Main()
{
double a = 123.456789012345;
Console.WriteLine(a);
Console.WriteLine("{0:F6}", a);
Console.WriteLine("{0:F2}", a);
}
}
//48,设置输出值得货币值与输出宽度示例
using System;
class Program
{
static void Main()
{
int a = 80;
int b = 8000;
Console.WriteLine("{0:C2}", a);
Console.WriteLine("{0:C2}", b);
Console.WriteLine("{0,5}", a);
Console.WriteLine("{0,6}", b);
}
}
//49，利用控制符完成两位小数输出
using System;
class Program
{
static void Main()
{
float x = 168.56f;
Console.WriteLine("每件平均单价为:{0:F2}", x / 3);
Console.WriteLine("每件平均单价为:{0:C2}", x / 3);
}
}
//50,由键盘输入一个华氏温度，将其转化为摄氏温度
using System;
class Program
{
static void Main()
{
Console.Write("请输入华氏温度:");
String s = Console.ReadLine();
float f = float.Parse(s);
float c=(f-32)/1.8f;
Console.WriteLine("相应的摄氏温度是:{0:F1}", c);
}
}
//51,由键盘输入三角形的三条边a,b,c,试编程用海伦公式计算任意三角形的面积
using System;
class Program
{
static void Main()
{
double s, area;
Console.WriteLine("请输入三角形的三条边长:");
Console.Write("a= ");
string x = Console.ReadLine();
Console.Write("b= ");
string y = Console.ReadLine();
Console.Write("c= ");
string z= Console.ReadLine();
double a = double.Parse(x);
double b = double.Parse(y);
double c = double.Parse(z);
s = 1.0 / 2 * (a + b + c);
area = Math.Sqrt(s * (s - a) * (s - b) * (s - c));
Console.WriteLine("a={0:F2} b={0:F2} c={0:F2} s={3:F2}", a, b, c, s);
Console.WriteLine("area={0:F2}", area);
}
}
//52.设计一个方法，根据三角形的三边长求面积，如果不能构成三角形，给出提示信息
using System;
class Program
{
static double TriangleArea(float a, float b, float c)
{
if ((a + b <= c) || (a + c <= b) || (b + c) <= a)
return -1;
double s = (a + b + c) / 2.0;
return Math.Sqrt(s * (s - a) * (s - b) * (s - c));
}
static void Main()
{
Console.WriteLine("请输入a,b,c:");
Console.Write("a= ");
int a = Convert.ToInt32(Console.ReadLine());
Console.Write("b= ");
int b = Convert.ToInt32(Console.ReadLine());
Console.Write("c= ");
int c = Convert.ToInt32(Console.ReadLine());
double area = TriangleArea(a, b, c);
if(area==-1)
Console.WriteLine("{0},{1},{2}不能构成三角形!",a,b,c);
else
Console.WriteLine("边长为{0},{1},{2}三角形的面积:{3:F1}",a,b,c,area);
}
}
//53,用方法求两个不等长的数组元素的平均值
using System;
class Program
{
static void Main()
{
double[] a = new double[5] { 2, 3, 6, 8, 10 };
double[] b = new double[10] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
double aver1, aver2;
aver1 = average(a, 5);
Console.WriteLine("a数组元素的平均值:{0}", aver1);
aver2 = average(b,10);
Console.WriteLine("a数组元素的平均值:{0}", aver2);
}
static double average(double[] array, int len)
{
double sum = 0;
for (int i = 0; i < len; i++)
{
sum += array[i];
}
return sum / len;
}
}