更新了文件名。开始了数据结构

2024-04-14 06:55:53 +08:00
parent 9bc7edbf47
commit 45bcb90c6d
69 changed files with 455 additions and 0 deletions
--- a/Chapter08/struct1.c
+++ b/Chapter08/struct1.c
@@ -0,0 +1,113 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#define NAMESIZE 32
+
+struct
+{
+    int   i;
+    char  ch;
+    float f;
+} a =
+    {
+        1,
+        'a',
+},
+  b, c, *p, *q;
+
+struct simp_st
+{
+    int   i;
+    char  ch;
+    float f;
+    // char ch1;
+};   // __attribute__((packed));
+
+
+struct student_st
+{
+    int  id;
+    char name[NAMESIZE];
+    // struct birthday_st birth;
+    struct birthday_st
+    {
+        int year;
+        int month;
+        int day;
+    } birth;
+    int math;
+    int chinese;
+};
+
+
+void func(struct simp_st *b)
+{
+    printf("%d\n", sizeof(b));
+}
+
+int main()
+{
+    // TYPE NAME = VALUE;
+
+
+    struct simp_st  a;
+    struct simp_st *p = &a;
+
+    // func(a);
+
+    func(p);
+
+
+
+
+    // printf("sizeof(point) = %d\n", sizeof(p));
+    // printf("sizeof(struct) = %d\n", sizeof(a));
+    // out:
+    // sizeof(point) = 8
+    // sizeof(struct) = 12
+
+
+
+#if 0
+    struct student_st  stu    = {10011, "Alan", {2011, 11, 11}, 98, 97};
+    struct student_st *p      = &stu;
+    struct student_st  arr[2] = {{.name = "Alan"}, {.name = "John"}};
+
+    p = &arr[0];
+
+    // struct student_st stu = {.math = 98, .chinese = 97};
+
+    // printf("%d %s %d-%d-%d %d %d\n",
+    //        stu.id,
+    //        stu.name,
+    //        stu.birth.year,
+    //        stu.birth.month,
+    //        stu.birth.day,
+    //        stu.math,
+    //        stu.chinese);
+
+    // printf("%d %s %d-%d-%d %d %d\n",
+    //        p->id,
+    //        p->name,
+    //        p->birth.year,
+    //        p->birth.month,
+    //        p->birth.day,
+    //        p->math,
+    //        p->chinese);
+
+    for (int i = 0; i < 2; i++, p++)
+    {
+        printf("%s ", p->name);
+    }
+    printf("\n");
+
+#endif
+
+#if 0
+    struct simp_st a = {123, 456.789, 'a'};
+    a.i = 112233;
+    printf("%d %f %c", a.i, a.f, a.ch);
+#endif
+
+    exit(0);
+}