add hanshu

Code/hanshu1.c

@@ -0,0 +1,42 @@
+#include <stdio.h>
+
+float Calculator(float a, float b, char operator) 
+{
+    switch (operator) 
+    {
+        case '+':
+            return a + b;
+        case '-':
+            return a - b;
+        case '*':
+            return a * b;
+        case '/':
+            if (b != 0) {
+                return a / b;
+            } 
+            else {
+                printf("除数不能为0\n");
+                return 0;
+            }
+        default:
+            printf("用其它符号就不简单了哟 ^_^\n");
+            return 0;
+    }
+}
+int main() 
+{
+    float a, b;
+    char operator;
+
+    printf("输入第一个数字: ");
+    scanf("%f", &a);
+    printf("输入运算符 (+, -, *, /): ");
+    scanf(" %c", &operator);
+    printf("输入第二个数字: ");
+    scanf("%f", &b);
+    
+
+    printf("结果是:%.2f\n",Calculator(a, b, operator));
+
+    return 0;
+}

Code/hanshu2.c

@@ -0,0 +1,23 @@
+#include <stdio.h>
+
+int exchange(int *a, int *b) 
+{
+    int temp = *a;
+    *a = *b;
+    *b = temp;
+}
+
+int main() 
+{
+    int a, b;
+    printf("输入第一个数字: ");
+    scanf("%d", &a);
+    printf("输入第二个数字: ");
+    scanf("%d", &b);
+
+    printf("交换前: a = %d, b = %d\n", a, b);
+    exchange(&a, &b);
+    printf("交换后: a = %d, b = %d\n", a, b);
+
+    return 0;
+}

Code/shuzu1.c

@@ -0,0 +1,36 @@
+#include<stdio.h>
+
+int main()
+{
+    int x;
+    printf("请输入数组元素的个数:");
+    scanf("%d", &x);
+    int arr[x];
+    for (int i = 0; i < x; i++)
+    {
+        printf("请输入第%d个元素:", i + 1);
+        scanf("%d", &arr[i]);
+    }
+    
+    int max = arr[0];
+    for (int i = 0; i < x; i++)
+    {
+        if (arr[i] > max)
+        {
+            max = arr[i];
+        }
+    }
+    printf("最大值是:%d\n", max);
+
+    int min = arr[0];
+    for (int i = 0; i < x; i++)
+    {
+        if (arr[i] < min)
+        {
+            min = arr[i];
+        }
+    }
+    printf("最小值是:%d\n", min);
+
+    return 0;
+}

Code/shuzu2.c

@@ -0,0 +1,58 @@
+#include<stdio.h>
+#include<string.h>
+int main()
+{
+    int  flag = 0,num = 0,count = 0;
+    char name[20];
+    char name_list[40][20];
+    while(1)
+    {
+        printf("[1]记录名字 [2]显示已记录的同学的名字 [3]查询 [4]退出\n");
+        scanf("%d", &flag);
+        switch(flag)
+        {
+            case 1:
+                printf("请输入记录人数:\n");
+                scanf("%d", &num);
+                for (int i = 0; i < num; i++)
+                {
+                    printf("请输入第%d个同学的名字:", i + 1);
+                    scanf("%s", name_list[i]);
+                }
+                break;
+
+            case 2:
+                if (name_list[0][0] == '\0')
+                {
+                    printf("没有记录任何名字\n");
+                    break;
+                }
+                for (int i = 0; i < num; i++)
+                {
+                    printf("第%d个同学的名字是:%s\n", i + 1, name_list[i]);
+                }
+                break;
+
+            case 3:
+                printf("请输入要查询的名字:");
+                scanf("%s", name);
+                for (int i = 0; i < num; i++)
+                {
+                    if (strcmp(name, name_list[i]) == 0)
+                    {
+                        printf("%s是第%d个同学的名字\n", name_list[i], i + 1);
+                        break;
+                    }
+                    if (i == num - 1)
+                        printf("没有找到该同学的名字\n");
+                }
+                break;
+
+            case 4:
+                printf("退出程序\n");
+                return 0;
+        }
+    } 
+
+    return 0;
+}

Code/test.c

@@ -2,9 +2,31 @@
 
 int main()
 {
+    int x;
+    printf("请输入数组元素的个数:");
+    scanf("%d", &x);
+    // if (x <= 0)
+    // {
+    //     printf("回家吧，孩子，回家吧！\n");
+    //     return 1;
+    // }
+    int arr[x];
+    for (int i = 0; i < x; i++)
+    {
+        printf("请输入第%d个元素:", i + 1);
+        scanf("%d", &arr[i]);
+    }
     
+    int max = arr[0], min = arr[0];
+    for (int i = 0; i < x; i++)
+    {
+        if (arr[i] > max)
+            max = arr[i];
 
-
+        if (arr[i] < min)
+            min = arr[i];
+    }
+    printf("最大值是:%d\n最小值是:%d\n",max ,min);
 
     return 0;
 }

Code/zhizhen1.c

@@ -0,0 +1,16 @@
+#include<stdio.h>
+
+int main()
+{
+    int array[5] = {10, 20, 30, 40, 50};
+
+    int *p = array;
+
+    printf("通过数组获取40:%d\n", array[3]);
+    printf("通过数组获取40:%d\n", *(array+3));
+    printf("通过指针获取40:%d\n", p[3]);
+    printf("通过指针获取40:%d\n", *(p + 3));
+
+
+    return 0;
+}