第五章完结

Chapter5/simple1.c

@@ -0,0 +1,38 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#define M 3
+
+int main()
+{
+    // int arr[M] = {1};
+    // static int arr[M];
+    int arr[] = {1, 2, 3, 4, 5, 6};
+
+    printf("%d\n", sizeof(arr) / sizeof(arr[0]));
+
+    printf("%d\n", sizeof(arr));
+    // out: 12
+
+    printf("arr = %p\n", arr);
+
+    // arr = {4, 5, 6};
+    // arr常量，不可赋值
+
+    // for (int i = 0; i < M; i++)
+    // {
+    //     scanf("%d", &arr[i]);
+    // }
+
+    arr[3] = 10;
+    printf("arr[3] = %d\n", arr[3]);
+    // out: arr[3] = 10
+    // 正常输出，起始越界了
+
+    for (int i = 0; i < M; i++)
+    {
+        printf("%p --> %d\n", &arr[i], arr[i]);
+    }
+
+    exit(0);
+}