2018081309027陶奕兮

level0/C01.cpp

@@ -0,0 +1,5 @@
+#include<stdio.h>
+int main()
+{
+	printf("Hello world!I'm tyx!");
+}

level0/C11.cpp

@@ -0,0 +1,12 @@
+#include<stdio.h>
+int main()
+{
+	int n;
+	printf("Please put in a number:\n");
+	scanf("%d",&n);
+	if(n%2==0) printf("It's an even number.\n");
+	else printf("It's an odd number.\n");
+	if(n>0) printf("It's a positive number.\n");
+	else if(n==0) printf("It's zero.\n");
+	else printf("It's a negative number.\n");
+}

level0/C12.cpp

@@ -0,0 +1,9 @@
+#include<stdio.h>
+int main()
+{
+	int n;
+	printf("Please put in a number:\n");
+	scanf("%d",&n);
+	if(n%13==0) printf("Yes.\n");
+	else printf("No.\n");
+}

level0/C210.cpp

@@ -0,0 +1,21 @@
+#include<stdio.h>
+int main()
+{
+	int b[5],c[10]={0};
+	printf("Please put in 5 numbers(between 0-9):\n");
+	for(int i=0;i<5;i++)
+	{
+		scanf("%d",&b[i]);
+		for(int t=0;t<10;t++)
+		{
+			if(b[i]==t) c[t]++;
+		}
+	}
+	for(int t=0;t<10;t++)
+	{
+		for(int i=1;i<=c[t];i++)
+		{
+			printf("%d,",t);
+		}
+	}
+}

level0/C22.cpp

@@ -0,0 +1,10 @@
+#include<stdio.h>
+#include<stdlib.h>
+int main()
+{
+	system("color 0a");
+	while(1)
+	{
+		printf("0 1");
+    }
+}

level0/C23.cpp

@@ -0,0 +1,10 @@
+#include<stdio.h>
+#include<stdlib.h>
+int main()
+{
+	system("color 0a");
+	while(1)
+	{
+		printf("%d\t",rand()/1000);
+    }
+}

level1/p01_runningLetter/1.cpp

@@ -0,0 +1,20 @@
+#include<stdio.h>
+#include<stdlib.h>
+int main()
+{
+	int i,wide=80;
+	bool turn;
+	for(i=0;;)
+	{
+		for(int t=0;t<=i;t++)
+		{
+			printf(" ");
+		}
+		printf("R");
+		system("cls");
+		if(i==wide) turn=1;
+		if(i<0) turn=0;
+		if(turn==0) i++;
+		else i--;
+	}
+} 

level1/p02_isPrime/lv1_p02.cpp

@@ -0,0 +1,18 @@
+#include<stdio.h>
+int main()
+{
+	int n,ans=0;
+	printf("Please input a positive integer:\n");
+	scanf("%d",&n);
+	for(int t=2;t<=n/2;t++)
+	{
+		if(n%t==0)
+		{
+			ans=1;
+			break;
+		}
+	}
+	if(ans==1) printf("It's not a prime number.");
+	else printf("It's a prime number.");
+	return 0;
+}

level1/p03_Diophantus/lv1_p03.cpp

@@ -0,0 +1,12 @@
+#include<stdio.h>
+int main()
+{
+	for(int age=1;;age++)
+	{
+		if(age/6+age/12+age/7+5+age/2+4==age)
+		{
+			printf("%d",age-4);
+			break;
+		}
+	}
+}

level1/p04_ narcissus/lv1_p04.cpp

@@ -0,0 +1,16 @@
+#include<stdio.h>
+int main()
+{
+	int x,g,s,b;
+	for(x=100;x<=999;x++)
+	{
+		g=x%10;
+		s=((x-g)/10)%10;
+		b=(x-g-s)/100;
+		if(x==g*g*g+s*s*s+b*b*b)
+		{
+			printf("%d��",x);
+		}
+	}
+	getchar();
+}

level1/p05_allPrimes/lv1_p05.cpp

@@ -0,0 +1,17 @@
+#include<stdio.h>
+#include<time.h>
+int main()
+{
+	long t1,t2;
+	t1=clock();
+	for(int n=2;n<=1000;n++)
+	{
+		for(int t=2;t<=n/2+1;t++)
+		{
+			if(t==n/2+1) printf("%d,",n);
+			if(n%t==0) break;
+		}
+	}
+	t2=clock();
+	printf("\nTotally used %ld ms.\n",(t2-t1));
+}

level1/p06_Goldbach/lv1_p06.cpp

@@ -0,0 +1,37 @@
+#include<stdio.h>
+int is_p(int x)
+{
+	for(int i=2;i<=x/2+1;i++)
+	{
+		if(i==x/2+1) return 1;
+		if(x%i==0)
+		{
+			return 0;
+			break;
+		}
+	}
+}
+
+int main()
+{
+	int prime;
+	for(int t=4;t<101;t=t+2)
+	{
+		int m=2,n;
+		for(;;)
+		{
+			prime=is_p(m);
+			if(prime==1)
+			{
+				n=t-m;
+				prime=is_p(n);
+				if(prime==1) 
+				{
+					printf("%d=%d+%d\n",t,m,n);
+					break;
+				}
+			}
+			m++;
+		}
+	}
+}