交作业

practices/c/level1/p01_runningLetter/running letter.c

@@ -0,0 +1,31 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include<windows.h>
+int main(void)
+{
+    printf("please input a character:");
+    char ch;
+    scanf_s("%c",&ch);
+    int a=0;
+    for(;a<100;++a)
+    {
+    system("cls");
+    Sleep(100);
+    int i=0;
+    for(;i<a;++i)
+    printf(" ");
+    printf("%c",ch);
+    }
+    for(;!(a<0);a--)
+    {
+    system("cls");
+    Sleep(100);
+    int i=0;
+    for(;i<a;++i)
+    printf(" ");
+    printf("%c",ch);
+    }
+    return 0;
+}
+
+

practices/c/level1/p02_isPrime/IsPrime.c

@@ -0,0 +1,31 @@
+#include<stdio.h>
+#include<stdlib.h>
+#include<stdbool.h>
+bool check(int n);
+int main(void)
+{
+	int num;
+	printf("please input a number : ");
+	scanf_s("%d", &num);
+	getchar();
+	while (num <= 1)
+	{
+		printf("error, please input a number is above 1 :");
+		scanf_s("%d", &num);
+		getchar();
+	}
+	if (check(num))
+		printf("\n%d is a prime", num);
+	else
+		printf("\n%d is not a prime", num);
+	getchar();
+	return 0;
+}
+
+bool check(int n)
+{
+	for (int i = 2; i < n; ++i)
+		if (!(n%i))
+			return false;
+	return true;
+}

practices/c/level1/p03_Diophantus/Diophantus.c

@@ -0,0 +1,14 @@
+#include<stdio.h>
+int main(void)
+{
+	for (int i = 10; i <= 100; ++i)
+	{
+		if (84 * i == 84 * 9 + 75 * i) {
+			printf("when his son died his age is %d", i - 4);
+			getchar();
+			return 0;
+		}
+
+	}
+	return 0;
+}

practices/c/level1/p04_ narcissus/narcissus.c

@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include<math.h>
+int main(void)
+{
+    for(int i=100;i<1000;++i)
+    {
+        int a=i/100;
+        int b=i%100/10;
+        int c=i%100%10;
+        if(i==pow(a,3)+pow(b,3)+pow(c,3))
+        printf("%d ",i);
+    }
+    getchar();
+    return 0;
+}

practices/c/level1/p05_allPrimes/allPrimes.c

@@ -0,0 +1,34 @@
+#include<stdio.h>
+#include<time.h>
+#include<stdbool.h>
+bool check(int n, int array[]);
+int main(void) 
+{
+	double op = clock();
+	int array[10000];
+	array[0] = 2;
+	array[1] = 0;
+	int num = 1;
+	for(int i=3;i<=10000;++i)
+		if (check(i, array))
+		{
+			array[num] = i;
+			++num;
+			array[num] = 0;
+		}
+	for (int a = 0; a < num; ++a)
+		printf("%d\n", array[a]);
+	double ed = clock();
+	printf("%lf",(ed - op)/1000);
+	getchar();
+	return 0;
+}
+
+bool check(int n, int array[])
+{
+
+	for (int i = 0; array[i] != 0; ++i)
+		if (!(n%array[i]))
+			return false;
+	return true;
+}

practices/c/level1/p06_Goldbach/goldback.c

@@ -0,0 +1,42 @@
+#include<stdio.h>
+#include<stdbool.h>
+#include<time.h>
+bool check(int n, int array[]);
+int main(void)
+{
+	double op, ed;
+	op = clock();
+	int array[10000];
+	array[0] = 2;
+	array[1] = 0;
+	int num = 1;
+	for (int i = 3; i <= 1000; ++i)
+		if (check(i, array))
+		{
+			array[num] = i;
+			++num;
+			array[num] = 0;
+		}
+	for (int a = 4; a <= 1000; a += 2)
+		for (int d = 0; array[d] != 0&&array[d]<=a/2+1; ++d)
+		{
+			for (int e = 0; array[e] != 0; ++e)
+			{
+				if (array[e] == a - array[d])
+					printf("%d=%d+%d\n", a, array[d], array[e]);
+			}
+		}
+	ed = clock();
+	printf("%f", (ed - op) / 1000);
+	getchar();
+	return 0;
+}
+
+bool check(int n, int array[])
+{
+
+	for (int i = 0; array[i] != 0; ++i)
+		if (!(n%array[i]))
+			return false;
+	return true;
+}

practices/c/level1/p08_hanoi/hanoi.c

@@ -0,0 +1,23 @@
+#include<stdio.h>
+void hanoi(int n, char a, char b, char c);
+int main(void)
+{
+	printf("please input the number you want: ");
+	int num;
+	scanf_s("%d", &num);
+	getchar();
+	hanoi(num, 'a', 'b', 'c');
+	getchar();
+	return 0;
+}
+
+void hanoi(int n, char a, char b, char c)
+{
+	if (n == 1)
+		printf("%d: %c>>%c\n", n, a, c);
+	else {
+		hanoi(n - 1, a, c, b);
+		printf("%d :%c>>%c\n", n, a, c);
+		hanoi(n - 1, b, a, c);
+	}
+}

practices/c/level1/p09_maze/maze.c

@@ -0,0 +1,119 @@
+#include<stdio.h>
+#include <windows.h>
+#include <stdlib.h>
+#include <conio.h>
+#include<stdbool.h>
+struct maze
+{
+	int x;
+	int y;
+	int dir;
+};
+char m[30][30];
+struct maze man;
+const int xdir[5] = { 0, 1, 0, -1 ,0};//w a s d
+const int ydir[5] = { -1,0,1,0 ,0};//w a s d
+void map(void);
+void show(void);
+void ini(void);
+void turn(void);
+bool check(void);
+void move(void);
+void show0(void);
+int main(void)
+{
+	ini();
+	show();
+	while (true)
+	{
+		Sleep(60);
+		system("cls");
+		turn();
+		if (check())
+			move();
+		man.dir = 4;
+		show();
+	}
+	getchar();
+	return 0;
+}
+
+void map(void)
+{
+	for (int i = 0; i < 30; ++i)
+		m[0][i] = '*';
+	for (int a = 4; a < 30; ++a)
+		m[a][0] = '*';
+	for (int b = 1; b < 25; ++b)
+		m[29][b] = '*';
+	for (int c = 1; c < 30; ++c)
+		m[c][29] = '*';
+	for (int a = 5; a < 10; ++a)
+		m[a][4] = '*';
+	for (int b = 1; b < 5; ++b)
+		m[4][b] = '*';
+	for (int i = 1; i < 20; ++i)
+		m[i][14] = '*';
+	for (int i = 9; i < 20; ++i)
+		m[19][i] = '*';
+	for (int i = 24; i < 30; ++i)
+		m[4][i] = '*';
+	for (int i = 14; i < 29; ++i)
+		m[i][24] = '*';
+}
+
+void show(void)
+{
+	for (int a = 0; a < 30; ++a) 
+	{
+		for (int b = 0; b < 30; ++b)
+			printf("%c", m[a][b]);
+		printf("\n");
+	}
+}
+
+void ini(void)
+{
+	map();
+	man.x = 0;
+	man.y = 1;
+	m[man.y][man.x] = 'H';
+}
+
+void turn(void) {  
+	if (_kbhit()) {
+		char dir = _getch();  //读取输入的键 
+		switch (dir) {  //改变方向 
+		case 119: man.dir = 0; break;
+		case 100: man.dir =1; break;
+		case 115: man.dir = 2; break;
+		case 97: man.dir =3; break;
+		}
+	}
+}
+
+bool check(void)
+{
+	if (m[man.y + ydir[man.dir]][man.x + xdir[man.dir]] == '*')
+		return false;
+	else
+		return true;
+
+}
+
+void move(void)
+{
+	m[man.y][man.x] = ' ';
+	man.x = man.x + xdir[man.dir];
+	man.y = man.y + ydir[man.dir];
+	m[man.y][man.x] = 'H';
+}
+
+void show0(void)
+{
+	for (int a = 0; a < man.y; ++a)
+		for (int b = 0; b < man.x; ++b)
+			if (m[man.y][man.x] == 'H')
+				printf("%c", m[man.y][man.x]);
+
+}