第二次提交

level1/p01_runningLetter/zuoye/跳动的字符.c

@@ -0,0 +1,33 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <windows.h>
+int main()
+{
+	int i=0,j=1,m=0,k;
+	char words[20];
+	scanf("%s",words);
+	k=strlen(words);            // ȡ�ַ������� 
+	system("mode con cols=100");//�趨����̨���� 
+	while(1)        
+{
+	printf("%s",words);
+	system("cls");              //���� 
+    for(i=0;i<j;i++)
+{
+	printf(" ");	
+}
+    if(j==100-k)
+    m=1;
+    if(j==0)
+    m=0;
+    if(m==0)
+	j++;
+    else if(m==1)
+    j--;
+    Sleep(100);
+}
+
+    return 0;	 
+}
+
+

level1/p02_isPrime/素数的判断.c

@@ -0,0 +1,31 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+int main()
+{   
+    int prime;
+    int i;
+    int j;
+	printf("请输入一个正整数");
+	scanf("%d",&prime);
+	if(prime==1)
+	{	
+		printf("%d不是素数\n",prime);
+	}
+	else 
+	{
+	for(i=2;i<=prime-1;i++)
+	{
+	if(	prime%i==0)
+	{
+		printf("%d不是素数\n",prime);
+		return 0; 
+	}
+    }
+        printf("%d是素数\n",prime); 	
+	}
+	system("pause");
+	return 0;
+}
+

level1/p03_Diophantus/丢番图年龄.cpp

@@ -0,0 +1,21 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main()
+{
+	double diufantu_age;
+	double d_son_age;
+	for(diufantu_age=12.0; ;diufantu_age++)
+	{
+		d_son_age=diufantu_age/2;
+		double sum=diufantu_age/6+diufantu_age/12+diufantu_age/7+5.0+4.0+d_son_age;
+			if(diufantu_age==sum)
+		{
+			break;
+		}
+
+
+	}
+	printf("diufantu's age is %-6.f",diufantu_age);
+	return 0;
+}

level1/p04_ narcissus/水仙花数.cpp

@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main()
+{
+	int n;
+	int a=0,b=0,c=0;
+	int sum;
+	for(n=100;n<1000;n++)
+	{
+		a=n/100;
+		b=n/10-n/100*10;
+		c=n/1-n/100*100-b*10;
+		sum=a*a*a+b*b*b+c*c*c;
+		if(sum==n)
+		{
+			printf("%d ",n);
+		}
+	}
+	return 0;
+}
+

level1/p05_allPrimes/打印all素数.cpp

@@ -0,0 +1,41 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h> 
+#include <time.h> 
+
+bool judge(int prime)
+{
+	int i;
+	int j;
+	for(i=2;i<=(int)sqrt(prime);i++)
+	{
+		j=prime%i;
+		if(j==0)
+		{
+		return false;
+		}
+	}
+	return true;
+}
+
+int main()
+{
+	int prime,clock1,clock2;
+	clock1=clock();
+	for(prime=2;prime<1001;prime++)
+	{
+		if(prime==2)
+		{
+			printf(" %d  ",prime);
+		}
+
+		else if(judge(prime))
+		{
+			printf(" %d ",prime); 
+		} 
+	}
+	clock2=clock();
+	printf("ʱ����%d����",clock2-clock1);
+	return 0;
+}
+

level1/p06_Goldbach/哥德巴赫猜想的正确性.cpp

@@ -0,0 +1,66 @@
+#include <stdio.h>
+#include <stdlib.h>
+bool judge(int prime)
+{
+	int i;
+	for(i=2;i<prime-1;i++)
+	{
+		if(prime%i==0)
+		return false;
+	}
+	return true;
+}
+
+
+int main()
+{
+	int prime[50],even[50];
+	int n=0;
+	int m=0;
+	int q=0;
+	int j=0;
+	for(int i=4;i<100;i++)
+	{
+		even[j]=i;
+		i++;
+		j++;
+
+	}
+	for(int i=2;i<100;i++)
+	{
+		if(i==2)
+		{
+			prime[n]=i;
+			n++;
+		}
+		else if(judge(i))
+		{
+			prime[n]=i;
+			n++;
+		}
+
+	}
+	for(m=0;m<50;m++)
+	{
+		for(n=0;n<50;n++)
+		{
+			for(q=0;q<50;q++)
+			{
+			if(even[m]==prime[n]+prime[q])
+			{
+				printf("it is true\n");
+				return 0;
+			}
+			}
+
+		}
+	}
+	printf("it is false\n");
+	return 0;
+}
+
+
+
+
+
+

level1/p07_encrypt_decrypt/解密加密函数.cpp

@@ -0,0 +1,84 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void jiami(char a[200])
+{
+	for(int i=0;i<200;i++)
+	{
+		if(a[i]<='W'&&a[i]>='A')
+		{
+		a[i]=a[i]+3;
+		}
+		else if(a[i]>='X'&&a[i]<='Z')
+		{
+		a[i]=a[i]-23;
+		}
+		if(a[i]<='w'&&a[i]>='a')
+		{
+		a[i]=a[i]+3;
+		}
+		else if(a[i]>='x'&&a[i]<='z')
+		{
+		a[i]=a[i]-23;
+		}
+	}
+	printf("���ܺ���");
+	puts(a);
+}
+
+void jiemi(char b[200])
+{
+	for(int i=0;i<200;i++)
+	{
+		if(b[i]<='Z'&&b[i]>='D')
+		{
+		b[i]=b[i]-3;	
+		}
+		else if(b[i]<='C'&&b[i]>='A')
+		{
+		b[i]=b[i]+23;
+		}
+		if(b[i]<='z'&&b[i]>='d')
+		{
+		b[i]=b[i]-3;
+		}
+		else if(b[i]<='c'&&b[i]>='a')
+		{
+		b[i]=b[i]+23;
+		}
+	}
+	printf("���ܺ���");
+	puts(b);
+}
+
+int main()
+{
+	char mima[200];
+	gets(mima);
+	jiami(mima);
+	jiemi(mima);
+	return 0; 
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
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+
+
+
+
+
+
+

level1/p08_hanoi/汉诺塔问题的递归.cpp

@@ -0,0 +1,28 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+void function(int panzishu,char a,char b,char c)
+{
+	if(panzishu==1)
+	{
+	printf("将%c===>%c\n",a,c);
+	}
+	else
+	{
+	function(panzishu-1,a,c,b);
+	printf("将%c===>%c\n",a,c);
+	function(panzishu-1,b,a,c);
+	}
+}
+int main()
+{
+	int panzishu;
+	char a,b,c;
+	a='a';
+	b='b';
+	c='c';
+	printf("请输入汉诺塔的盘子数量:");
+	scanf("%d",&panzishu);
+	function(panzishu,a,b,c);
+	return 0;
+}