diff --git a/code.c++/P1/P1.cpp b/code.c++/P1/P1.cpp
new file mode 100644
index 0000000..356e70a
--- /dev/null
+++ b/code.c++/P1/P1.cpp
@@ -0,0 +1,19 @@
+// P1.cpp : 定义控制台应用程序的入口点。
+//
+
+#include "stdafx.h"  
+#include "iostream"
+using namespace std;
+int main()
+{
+	double n;
+	cin>>n;
+	double p,i;
+	for(i=1; i<=n; i++)
+	{
+		 p=1/n;
+		 cout<<p<<" ";
+	}
+	return 0;
+}
+
diff --git a/code.c++/P1/P1.v11.suo b/code.c++/P1/P1.v11.suo
new file mode 100644
index 0000000..81281af
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diff --git a/code.c++/P12/P12.cpp b/code.c++/P12/P12.cpp
new file mode 100644
index 0000000..0b0b09d
--- /dev/null
+++ b/code.c++/P12/P12.cpp
@@ -0,0 +1,33 @@
+// P12.cpp : 定义控制台应用程序的入口点。
+//
+
+#include "stdafx.h"
+#include "iostream"
+#include "string"
+using namespace std;
+
+void main()
+{
+	float pCan = 0.001;
+	float pNon = 0.999;
+	float pPosCan = 0.8;
+	float pPosNon = 0.1;
+	float px,py;
+	string z;
+	cin>>z;
+	if(z=="positive")
+	{
+		px = pPosCan*pCan;
+		py = pPosNon*pNon;
+	}
+	else if(z=="negative")
+	{
+		px = (1-pPosCan)*pCan;
+		py = (1-pPosNon)*pNon;
+	}
+	px=px/(px+py);
+	py=py/(px+py);
+	cout<<"p(1)="<<px<<endl;
+	cout<<"p(2)="<<py<<endl;
+}
+
diff --git a/code.c++/P12/P12.v11.suo b/code.c++/P12/P12.v11.suo
new file mode 100644
index 0000000..6aaceb5
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diff --git a/code.c++/P13/P13.cpp b/code.c++/P13/P13.cpp
new file mode 100644
index 0000000..4daee32
--- /dev/null
+++ b/code.c++/P13/P13.cpp
@@ -0,0 +1,40 @@
+// P13.cpp : 定义控制台应用程序的入口点。
+//
+
+#include "stdafx.h"
+#include "iostream"
+#include <cmath>
+using namespace std;
+
+double compMean(int x[],int n)
+{
+	double sum = 0;
+	for(int i=0;i<n;i++)
+	{
+		sum += x[i];
+	}
+	double mu = sum/n;
+	return mu;
+}
+
+double compVariance(int x[],int n,double mu)
+{
+	double sum = 0;
+	for(int i=0;i<n;i++)
+	{
+		sum += pow((x[i]-mu),2);
+	}
+	double sigma2 = sum/n;
+	return sigma2;
+}
+
+int main()
+{
+	int x[5]={7,38,4,23,18};
+	double mu = compMean(x,5);
+	double sigma2 = compVariance(x,5,mu); 
+	cout<<"The Expectation / Mean is:"<<mu<<endl;
+	cout<<"The Variance is:"<<sigma2<<endl;
+	cout<<"The Standard Deviation is:"<<sqrt(sigma2)<<endl;
+	return 0;
+}
\ No newline at end of file
diff --git a/code.c++/P13/P13.v11.suo b/code.c++/P13/P13.v11.suo
new file mode 100644
index 0000000..15f7bba
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diff --git a/code.c++/P14/P14.cpp b/code.c++/P14/P14.cpp
new file mode 100644
index 0000000..06209b7
--- /dev/null
+++ b/code.c++/P14/P14.cpp
@@ -0,0 +1,35 @@
+// P14.cpp : 定义控制台应用程序的入口点。
+//
+
+#include "stdafx.h"
+#include "iostream"
+#include <cmath>
+using namespace std;
+
+double compMean(int x[],int n)
+{
+	double sum = 0;
+	for(int i=0;i<n;i++)
+	{
+		sum += x[i];
+	}
+	double mu = sum/n;
+	return mu;
+}
+
+int main()
+{
+	int a = 2;
+    int b = 4;
+	int x[5]={7,38,4,23,18};
+	int y[5];
+	for(int i=0;i<5;i++)
+	{
+		y[i] = a*x[i]+b;
+	}
+	double xmu = compMean(x,5);
+    double ymu = compMean(y,5);
+	cout<<"a*Xmu+b="<<a*xmu+b<<endl;
+	cout<<"Ymu="<<ymu<<endl;
+	return 0;
+}
\ No newline at end of file
diff --git a/code.c++/P14/P14.v11.suo b/code.c++/P14/P14.v11.suo
new file mode 100644
index 0000000..68c1b9c
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diff --git a/code.c++/P15/P15.cpp b/code.c++/P15/P15.cpp
new file mode 100644
index 0000000..5b45014
--- /dev/null
+++ b/code.c++/P15/P15.cpp
@@ -0,0 +1,45 @@
+// P15.cpp : 定义控制台应用程序的入口点。
+//
+
+#include "stdafx.h"
+#include "iostream"
+#include <cmath>
+using namespace std;
+
+double compMean(int x[],int n)
+{
+	double sum = 0;
+	for(int i=0;i<n;i++)
+	{
+		sum += x[i];
+	}
+	double mu = sum/n;
+	return mu;
+}
+
+double compVariance(int x[],int n,double mu)
+{
+	double sum = 0;
+	for(int i=0;i<n;i++)
+	{
+		sum += pow((x[i]-mu),2);
+	}
+	double sigma2 = sum/n;
+	return sigma2;
+}
+
+int main()
+{
+	int x[5]={7,38,4,23,18};
+	int x2[5];
+	double xmu = compMean(x,5);
+	for(int i=0;i<5;i++)
+	{
+		x2[i] = pow(x[i],2);
+	}
+	double x2mu = compMean(x2,5);
+	double xvar = compVariance(x,5,xmu); 
+	cout<<"The Variance of X is:"<<xvar<<endl;
+	cout<<"E[X^2]-E[X]^2="<<x2mu-pow(xmu,2)<<endl;
+	return 0;
+}
\ No newline at end of file
diff --git a/code.c++/P15/P15.v11.suo b/code.c++/P15/P15.v11.suo
new file mode 100644
index 0000000..ff3b084
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diff --git a/code.c++/P2/P2.cpp b/code.c++/P2/P2.cpp
new file mode 100644
index 0000000..4511bde
--- /dev/null
+++ b/code.c++/P2/P2.cpp
@@ -0,0 +1,73 @@
+// P2.cpp : 定义控制台应用程序的入口点。
+//
+
+#include "stdafx.h"
+#include "iostream"
+#include "string"
+using namespace std;
+
+double sum1(string world[],int n,double wd[])
+{
+	double sum = 0;
+	double red = 0.6;
+	double green = 0.2;
+	for(int i=0;i<n;i++)
+	{
+		if(world[i] == "red")
+		{
+			wd[i] = red*1/n;
+		}
+		else if(world[i] == "green")
+		{
+			wd[i]=green*1/n;
+		}
+		sum += wd[i];
+	}
+	return sum;
+}
+
+double sum2(string world[],int n,double wd[])
+{
+	double sum = 0;
+	double red = 0.2;
+	double green = 0.6;
+	for(int i=0;i<n;i++)
+	{
+		if(world[i] == "red")
+		{
+			wd[i] = red*1/n;
+		}
+		else if(world[i] == "green")
+		{
+			wd[i]=green*1/n;
+		}
+		sum += wd[i];
+	}
+	return sum;
+}
+
+void main()
+ {
+	string name;
+	cin>>name;
+	string world[5]={"green","red","red","green","green"};
+	double wd[5];
+	double p1[5];
+	double p2[5];
+    if(name=="red")
+	{
+		for(int i=0;i<5;i++)
+	   {
+		 p1[i] = wd[i]/sum1(world,5,wd);
+		 cout<<p1[i]<<" ";
+	   }
+	}
+	else if(name=="green")
+	{
+		for(int i=0;i<5;i++)
+	   {
+		 p2[i] = wd[i]/sum2(world,5,wd);
+		 cout<<p2[i]<<" ";
+	   }
+	}
+ }
\ No newline at end of file
diff --git a/code.c++/P2/P2.v11.suo b/code.c++/P2/P2.v11.suo
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index 0000000..5b63f2e
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diff --git a/code.c++/P3/P3.cpp b/code.c++/P3/P3.cpp
new file mode 100644
index 0000000..d3e3548
--- /dev/null
+++ b/code.c++/P3/P3.cpp
@@ -0,0 +1,146 @@
+// P3.cpp : 定义控制台应用程序的入口点。
+//
+
+#include "stdafx.h"
+#include "iostream"
+#include "string"
+using namespace std;
+
+double sum1(string world[],int n,double wd[])
+{
+	double sum = 0;
+	double red = 0.6;
+	double green = 0.2;
+	for(int i=0;i<n;i++)
+	{
+		if(world[i] == "red")
+		{
+			wd[i] = red*1/n;
+		}
+		else if(world[i] == "green")
+		{
+			wd[i]=green*1/n;
+		}
+		sum += wd[i];
+	}
+	return sum;
+}
+
+double sum2(string world[],int n,double wd[])
+{
+	double sum = 0;
+	double red = 0.2;
+	double green = 0.6;
+	for(int i=0;i<n;i++)
+	{
+		if(world[i] == "red")
+		{
+			wd[i] = red*1/n;
+		}
+		else if(world[i] == "green")
+		{
+			wd[i]=green*1/n;
+		}
+		sum += wd[i];
+	}
+	return sum;
+}
+
+double sum3(string world[],int n,double p1[],double wd[])
+{
+	double sum = 0;
+	double red = 0.2;
+	double green = 0.6;
+	for(int i=0;i<n;i++)
+	{
+		if(world[i] == "red")
+		{
+			wd[i] = red*p1[i];
+		}
+		else if(world[i] == "green")
+		{
+			wd[i] = green*p1[i];
+		}
+		sum += wd[i];
+	}
+	return sum;
+}
+
+double sum4(string world[],int n,double p1[],double wd[])
+{
+	double sum = 0;
+	double red = 0.6;
+	double green = 0.2;
+	for(int i=0;i<n;i++)
+	{
+		if(world[i] == "red")
+		{
+			wd[i] = red*p1[i];
+		}
+		else if(world[i] == "green")
+		{
+			wd[i] = green*p1[i];
+		}
+		sum += wd[i];
+	}
+	return sum;
+}
+
+void main()
+ {
+	string name;
+	cin>>name;
+	string world[5]={"green","red","red","green","green"};
+	double wd[5];
+	double p1[5];
+	double p2[5];
+    if(name=="red,red")
+	{
+		for(int i=0;i<5;i++)
+	   {
+		 p1[i] = wd[i]/sum1(world,5,wd);
+		}
+		for(int i=0;i<5;i++)
+	   {
+		 p2[i] = wd[i]/sum4(world,5,p1,wd);
+		 cout<<p2[i]<<" ";
+	   }
+	}
+	else if(name=="red,green")
+	{
+		for(int i=0;i<5;i++)
+	   {
+		 p1[i] = wd[i]/sum1(world,5,wd);
+	   }
+		for(int i=0;i<5;i++)
+	   {
+		 p2[i] = wd[i]/sum3(world,5,p1,wd);
+		 cout<<p2[i]<<" ";
+	   }
+	}
+	if(name=="green,red")
+	{
+		for(int i=0;i<5;i++)
+	   {
+		 p1[i] = wd[i]/sum2(world,5,wd);
+		}
+		for(int i=0;i<5;i++)
+	   {
+		 p2[i] = wd[i]/sum4(world,5,p1,wd);
+		 cout<<p2[i]<<" ";
+	   }
+	}
+	else if(name=="green,green")
+	{
+		for(int i=0;i<5;i++)
+	   {
+		 p1[i] = wd[i]/sum2(world,5,wd);
+	   }
+		for(int i=0;i<5;i++)
+	   {
+		 p2[i] = wd[i]/sum3(world,5,p1,wd);
+		 cout<<p2[i]<<" ";
+	   }
+	}
+ }
+
diff --git a/code.c++/P3/P3.v11.suo b/code.c++/P3/P3.v11.suo
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index 0000000..b038813
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diff --git a/code.c++/P4/P4.cpp b/code.c++/P4/P4.cpp
new file mode 100644
index 0000000..225641b
--- /dev/null
+++ b/code.c++/P4/P4.cpp
@@ -0,0 +1,32 @@
+// P4.cpp : 定义控制台应用程序的入口点。
+//
+
+#include "stdafx.h"  
+#include <iostream>  
+#include <vector>  
+using namespace std;  
+  
+int main()  
+{  
+    int num, shift;  
+	cout<<"数组长度:";
+    cin >> num;
+	cout<<"右移位数:";
+	cin>>shift;
+    vector<int> array(num);  
+    for (int i = 0; i < num; i++) 
+	cin >> array[i];//输入n个数，区间[0，N）  
+    int pos = shift%num;  
+    if (pos == 0);  
+    else {  
+        while (pos--) {  
+            int temp = array[num - 1];  
+            for (int i = num - 1; i > 0; i--) array[i] = array[i - 1];  
+            array[0] = temp;  
+        }  
+    }  
+    for (int i = 0; i < array.size(); i++) {  
+        cout << array[i]<<' ';  
+    }  
+    return 0;  
+}  
\ No newline at end of file
diff --git a/code.c++/P4/P4.v11.suo b/code.c++/P4/P4.v11.suo
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index 0000000..afa2f5c
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diff --git a/code.c++/P65/P65.cpp b/code.c++/P65/P65.cpp
new file mode 100644
index 0000000..a2b13c9
--- /dev/null
+++ b/code.c++/P65/P65.cpp
@@ -0,0 +1,32 @@
+// P65.cpp : 定义控制台应用程序的入口点。
+//
+
+#include "stdafx.h"
+#include "iostream"
+#include <vector>
+#include "cmath"
+using namespace std;
+
+float log2(int x)
+{
+	float t = log(x)/log(2);
+	return t;
+}
+
+void main()
+{
+	int num;  
+	cout<<"个数:";
+    cin >> num;
+    vector<int> x(num);  
+    for (int i = 0; i < num; i++) 
+	cin >> x[i];//输入n个数，区间[0，N）
+	float h=0;
+	for(int i=0;i<num;i++)
+	{
+	    h += x[i]*log2(x[i]);
+	}
+	float H = -h;
+	cout<<"H="<<H<<endl;
+}
+
diff --git a/code.c++/P65/P65.v11.suo b/code.c++/P65/P65.v11.suo
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index 0000000..4b7d458
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