段林林level 1前五题

.vscode/c_cpp_properties.json

@@ -0,0 +1,66 @@
+{
+    "configurations": [
+        {
+            "name": "Mac",
+            "includePath": [
+                "${workspaceRoot}",
+                "/usr/include",
+                "/usr/local/include"
+            ],
+            "defines": [],
+            "browse": {
+                "path": [
+                    "/usr/include",
+                    "/usr/local/include"
+                ],
+                "limitSymbolsToIncludedHeaders": true,
+                "databaseFilename": ""
+            }
+        },
+        {
+            "name": "Linux",
+            "includePath": [
+                "${workspaceRoot}",
+                "/usr/include",
+                "/usr/local/include"
+            ],
+            "defines": [],
+            "browse": {
+                "path": [
+                    "/usr/include",
+                    "/usr/local/include"
+                ],
+                "limitSymbolsToIncludedHeaders": true,
+                "databaseFilename": ""
+            }
+        },
+        {
+            "name": "Win32",
+            "includePath": [
+                "${workspaceRoot}",
+                "C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/include/*",
+                "C:/Program Files (x86)/Windows Kits/10/Include/10.0.10240.0/um",
+                "C:/Program Files (x86)/Windows Kits/10/Include/10.0.10240.0/ucrt",
+                "C:/Program Files (x86)/Windows Kits/10/Include/10.0.10240.0/shared",
+                "C:/Program Files (x86)/Windows Kits/10/Include/10.0.10240.0/winrt"
+            ],
+            "defines": [
+                "_DEBUG",
+                "UNICODE"
+            ],
+            "browse": {
+                "path": [
+                    "C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/include/*",
+                    "C:/Program Files (x86)/Windows Kits/10/Include/10.0.10240.0/um",
+                    "C:/Program Files (x86)/Windows Kits/10/Include/10.0.10240.0/ucrt",
+                    "C:/Program Files (x86)/Windows Kits/10/Include/10.0.10240.0/shared",
+                    "C:/Program Files (x86)/Windows Kits/10/Include/10.0.10240.0/winrt"
+                ],
+                "limitSymbolsToIncludedHeaders": true,
+                "databaseFilename": ""
+            }
+        }
+
+
+    ]
+}

practices/c/level0/0-9.c

@@ -0,0 +1,20 @@
+#include<stdio.h>
+int main(void)
+{
+  int number[10]={0};
+  int i,j;
+
+  for(i=1;i<=5;i++){
+      scanf("%d",&j);
+      number[j]=1;
+  }
+
+  for(i=1;i<=9;i++){
+      if(number[i]==0){
+      printf("%d",i);
+  }
+
+  }
+   return 0;
+}
+

practices/c/level0/10000—hello.c

@@ -0,0 +1,14 @@
+#include<stdio.h>
+
+int main(void)
+{
+    int i = 0;
+
+    for(i = 0;i <1000;++i){
+        printf("Hello!\n");
+    }
+
+	 return 0;
+
+}
+

practices/c/level0/100_ou_shu.c

@@ -0,0 +1,15 @@
+#include<stdio.h>
+
+int main(void)
+{
+    int ou,i=0;
+
+    for(ou = 2;i < 50;++i){
+     printf("%d\n",ou);
+     ou += 2;
+     }
+
+	return 0;
+
+}
+

practices/c/level0/13的倍数判断.c

@@ -0,0 +1,15 @@
+#include <stdio.h>
+
+int main(void)
+{
+	int n = 0;
+	printf("Please input n:");
+	scanf("%d",&n);
+
+	if (0==n%13)
+	    printf("%d ÊÇ13µÄ±¶Êý",n);
+	else
+	    printf("%d ²»ÊÇ13µÄ±¶Êý",n);
+
+	return 0;
+}

practices/c/level0/3_5.c

@@ -0,0 +1,17 @@
+#include<stdio.h>
+
+int main(void)
+{
+    int k,i=0;
+
+    for(k =0 ;i <= 100;++i){
+        k = ++k;
+        if(0 == k % 3 && 0 != k % 5){
+           printf("%d\n",k);
+        }
+     }
+
+	return 0;
+
+}
+

practices/c/level0/7.c

@@ -0,0 +1,22 @@
+#include<stdio.h>
+
+int main(void)
+{
+    int k,j=0,i=0;
+
+    for(k =0 ;i < 100;++i){
+        k = ++k;
+        if(0 == k % 7 ){
+           printf("%d\n",k);
+        }
+    }
+
+     for( j = 0;j<10;++j){
+         printf("%d\n",k=j*10+7);
+        }
+
+
+	return 0;
+
+}
+

practices/c/level0/99.c

@@ -0,0 +1,16 @@
+#include<stdio.h>
+
+int main(void)
+{
+   int i,j;
+
+   for(i=1;i<=9;++i){
+      for(j=1;j<=i;++j)
+         printf("%d*%d=%d\t",j,i,i*j);
+         printf("\n");
+   }
+
+
+   return 0;
+}
+

practices/c/level0/factorial.c

@@ -0,0 +1,26 @@
+#include <stdio.h>
+
+    int fac(int i){
+    if (1 == i)
+        return 1;
+    else
+        return i*fac(i-1);
+    }
+
+int main(void){
+
+    int i,j;
+    printf("Please input j:");
+    scanf("%d",&j);
+
+    for (i=1;i<=j;++i){
+        fac(j);
+    }
+
+    printf("%d! = %d",j,fac(j));
+
+
+
+
+    return 0;
+}

practices/c/level0/fibonacci.c

@@ -0,0 +1,26 @@
+#include<stdio.h>
+#define SIZE 10
+
+int fibonacci(int n)
+{
+    if (n == 0)
+        return 0;
+    else if (n == 1)
+        return 1;
+    else
+        return fibonacci(n-1)+fibonacci(n-2);
+}
+
+int main(void)
+{
+    int i,j;
+    printf("Input j:");
+    scanf("%d",&j);
+
+    for (i=0;i<j;++i){
+        printf("%d\t",fibonacci(i));
+    }
+
+    return 0;
+}
+

practices/c/level0/hello world.c

@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+/* run this program using the console pauser or add your own getch, system("pause") or input loop */
+
+int main(int argc, char *argv[]) {
+	printf("hello world,I am Duan Linlin!");
+	return 0;
+}

practices/c/level0/n.c

@@ -0,0 +1,27 @@
+#include<stdio.h>
+#define M 10000
+int main(void)
+{
+   int i,j=0,n;
+   int a[M],b[M];
+
+   printf("please input n:\n");
+   scanf("%d",&n);
+   printf("please input %d numbers:\n",n);
+
+   for(i=1;i<=n;++i){
+        scanf("%d",&a[i]);
+   }
+
+   for(i=n;i>=0;i--){
+        b[++j]=a[i];
+   }
+
+   for(i=1;i<=n;++i){
+        printf("%d\t",b[i]);
+   }
+
+   return 0;
+}
+
+

practices/c/level0/pai_xu.c

@@ -0,0 +1,27 @@
+#include <stdio.h>
+#include <stdlib.h>
+int main(void)
+
+{
+    int array[10];
+    int i,j,k;
+
+    for(i=0;i<=9;++i){
+        array[i]=0;
+    }
+
+    for(i=1;i<=5;++i){
+        scanf("%d",&k);
+        array[k]++;
+    }
+
+    for(i=0;i<=9;++i){
+        for(j=1;j<=array[i];++j){
+            printf("%d\t",i);
+        }
+    }
+
+    system("pause");
+
+    return 0;
+}

practices/c/level0/rate.c

@@ -0,0 +1,15 @@
+#include <stdio.h>
+#define RATE 6.90698365
+
+int main(void){
+    int dollar,RMB;
+    printf("Please input dollar:");
+    scanf("%d",&dollar);
+    RMB = dollar * RATE;
+    printf("%d dollar = %d RMB",dollar,RMB);
+
+    return 0;
+
+
+
+}

practices/c/level0/run_nian.c

@@ -0,0 +1,17 @@
+#include <stdio.h>
+
+int main(void)
+{
+	int year = 0;
+
+	printf("Please input year:");
+	scanf("%d",&year);
+
+	if ((0 != year % 100 && 0 == year % 4) || 0 == year % 400)
+
+            printf("%d is leap year",year);
+        else
+            printf("%d 不是闰年",year);
+
+	return 0;
+}

practices/c/level0/shu_zu_he.c

@@ -0,0 +1,23 @@
+#include<stdio.h>
+#define SIZE 10
+
+int main(void)
+{
+    int array[SIZE];
+    int i,j,sum=0;
+    printf("Please input shu_zu_yuan_su:");
+
+    for (i=0;i<10;i++){
+        scanf("%d",&j);
+        array[i]=j;
+    }
+
+    for (i=0;i<10;i++){
+        sum = sum + array[i];
+    }
+
+    printf("The sum of array[%d] is:%d ",SIZE,sum);
+
+    return 0;
+}
+

practices/c/level0/zhi_jiao_triangle.c

@@ -0,0 +1,15 @@
+#include <stdio.h>
+
+int main(void){
+    int a,b,c;
+    printf("Please input a,b,c of triangle:\n");
+    scanf("%d,%d,%d",&a,&b,&c);
+
+    if(a*a == b*b + c*c || b*b == c*c + a*a || c*c == a*a + b*b)
+        printf("��������Ϊֱ��������\n");
+    else
+        printf("�������β���ֱ��������\n");
+
+    return 0;
+
+}