完成了running letter

level1/p01_runningLetter/奔跑的字母.cpp

@@ -0,0 +1,29 @@
+#include <stdio.h>
+#include <stdlib.h>
+#define LENGTH 119
+int main(int argc, char *argv[])
+{
+	int i,j,k;
+	for(i=1;i<=LENGTH;i++)
+	{
+		printf("a");
+	    system("cls");
+	    for(j=1;j<=i;j++)
+	    {
+    		printf(" ");
+    	}
+	}
+	for(i=LENGTH;i>=1;i--)
+	{
+		printf("a");
+		system("cls");
+		for(j=i;j>=1;j--)
+		{
+			printf(" ");
+		}
+	}
+	system("cls");
+	printf("a");
+	system("pause");
+	return 0;
+}

level1/p02_isPrime/p02_isPrime.cpp

@@ -0,0 +1,28 @@
+#include <stdio.h>
+#include <stdlib.h>
+int main(int argc, char *argv[])
+{
+	int i,n,k;
+	k=1;
+	loop:scanf("%d",&n);
+	if(n<=0)
+	{
+		printf("������һ��������\n"); 
+		goto loop;
+	}
+	for(i=2;i<n;i++)
+	{
+		if(n%i==0)
+		{
+			k=0;
+		}
+	}
+	if(k==0||n==1||n==2)
+	{
+		printf("��������\n"); 
+	}
+	else 
+	   printf("������\n");
+	   system("pause");
+	return 0;
+}

level1/p03_Diophantus/p03_Diophantus.cpp

@@ -0,0 +1,15 @@
+#include <stdio.h>
+#include <stdlib.h>
+int main(int argc, char *argv[])
+{
+	float x;
+	for(x=1;x<=100;x++)
+	{
+		if(x*1/6+x*1/12+x*1/7+5+0.5*x+4==x)
+		{
+			printf("��ʱ����ͼ%.0f��\n",x-4);
+		}
+	}
+	system("pause");
+	return 0;
+}

level1/p04_ narcissus/p04_ narcissus.cpp

@@ -0,0 +1,17 @@
+#include <stdio.h>
+#include <stdlib.h>
+int main(int argc, char *argv[])
+{
+	int i,a,b,c,n;
+	printf("3λˮ�ɻ�����\n"); 
+	for(i=100;i<=999;i++)
+	{
+		a=i/100;
+		b=(i/10)%10;
+		c=i%10;
+		if(i==a*a*a+b*b*b+c*c*c)
+		printf("%d=%d^3+%d^3+%d^3\n",i,a,b,c);
+	}
+	system("pause");
+	return 0;
+}

level1/p05_allPrimes/p05_allPrimes.cpp

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <time.h>
+#include <stdlib.h>
+#include <math.h> 
+#define N 2000
+bool prime(int n)
+{
+	int i,k;
+	k=1; 
+	for(i=2;i<sqrt(n);i++)
+	{
+		if(n%i==0)
+		{
+			k=0;
+		}
+	}
+	return k;
+}
+int main(int argc, char *argv[])
+{
+	int i,s;
+	clock_t start, finish; 
+    double Total_time; 
+	start = clock(); 
+	for(i=2;i<=N;i++)
+	{
+		if(prime(i)==1)
+		{
+			printf("%d ",i);
+		}
+	}
+	printf("\n");
+	finish = clock(); 
+	Total_time = (double)(finish-start) / CLOCKS_PER_SEC; 
+	printf( "time:%f seconds\n", Total_time); 
+	return 0;
+}

level1/p06_Goldbach/p06_Goldbach.cpp

@@ -0,0 +1,30 @@
+#include <stdio.h>
+#include <math.h>
+bool prime(int n)
+{
+	int i,k;
+	k=1;
+	for(i=2;i<sqrt(n);i++)
+	{
+		if(n%i==0)
+		{
+			k=0;
+		}
+	}
+	return k;
+}
+int main(int argc, char *argv[])
+{
+	int i,j,t,n,s;
+	for(i=4;i<=100;i=i+2)
+	{
+		for(j=2;j<i;j++)
+		{
+			if((prime(j)==1)&&(prime(i-j)==1))
+			{
+				printf("%d=%d+%d\n",i,j,i-j);
+			}
+		}
+	}
+	return 0;
+}

level1/p07_encrypt_decrypt/p07_encrypt_decrypt_ASCII+5.cpp

@@ -0,0 +1,65 @@
+#include <stdio.h>
+#include <string.h>
+#define LENGTH 100000
+//�˼��ܷ���Ϊ���ַ���ASCII��+5 
+int encrypt(char s[])
+{
+	int a[LENGTH];
+	int i;
+	for(i=1;i<=LENGTH;i++)
+	{
+		a[i]=-1;
+	}
+	for(i=0;i<strlen(s);i++)
+	{
+		a[i]=s[i];
+	}
+	for(i=0;i<strlen(s);i++)
+	{
+		if(a[i]!=-1)
+		{
+			a[i]=a[i]+5;
+		}
+	}
+	for(i=0;i<strlen(s);i++)
+	{
+		s[i]=(char)a[i];
+	}
+	return 0;
+}
+int decrypt(char s[])
+{
+	int b[LENGTH];
+	int x;
+	for(x=1;x<=LENGTH;x++)
+	{
+		b[x]=-1;
+	}
+	for(x=0;x<strlen(s);x++)
+	{
+		b[x]=s[x];
+	}
+	for(x=0;x<strlen(s);x++)
+	{
+		if(b[x]!=-1)
+		{
+			b[x]=b[x]-5;
+		}
+	}
+	for(x=0;x<strlen(s);x++)
+	{
+		s[x]=(char)b[x];
+	}
+	return 0;
+}
+int main(int argc, char *argv[])
+{
+	char s[LENGTH]="null";
+	int i;
+	scanf("%[^\n]",s);
+	encrypt(s);
+	printf("���ܺ�%s\n",s);
+	decrypt(s);
+	printf("���ܺ�%s\n",s);
+	return 0;
+}

level1/p08_hanoi/p08_hanoi.cpp

@@ -0,0 +1,28 @@
+#include <stdio.h>
+#include <string.h>
+#include <time.h> 
+void hanoi(int n,char a,char b,char c)
+{
+	if(n==1)
+	printf("%c��%c\n",a,c);
+	else
+	{
+		hanoi(n-1,a,c,b);
+		printf("%c��%c\n",a,c);
+		hanoi(n-1,b,a,c); 
+	}
+} 
+int main(int argc, char *argv[])
+{
+	int n;
+	printf("��������������"); 
+	scanf("%d",&n);
+	clock_t start, finish;                         
+    double Total_time; 
+	start = clock();  
+	hanoi(n,'A','B','C');
+	finish = clock();                              
+    Total_time = (double)(finish-start) / CLOCKS_PER_SEC;
+    printf( "����ʱ�䣺%f seconds\n", Total_time);  
+	return 0;
+}