From c1f45b94a45b5f1d68ddb260ffd2d77039ee3212 Mon Sep 17 00:00:00 2001 From: jf-home Date: Sun, 1 Sep 2024 16:54:38 +0800 Subject: [PATCH] =?UTF-8?q?=E5=A4=9A=E6=80=81=E6=B5=8B=E8=AF=95=E9=80=9A?= =?UTF-8?q?=E8=BF=87?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- README.en.md | 36 ------------------------------------ README.md | 2 +- main.c | 43 +++++++++++++++++++++++++++++++++++-------- 3 files changed, 36 insertions(+), 45 deletions(-) delete mode 100644 README.en.md diff --git a/README.en.md b/README.en.md deleted file mode 100644 index d424473..0000000 --- a/README.en.md +++ /dev/null @@ -1,36 +0,0 @@ -# cmake_demo - -#### Description -{**When you're done, you can delete the content in this README and update the file with details for others getting started with your repository**} - -#### Software Architecture -Software architecture description - -#### Installation - -1. xxxx -2. xxxx -3. xxxx - -#### Instructions - -1. xxxx -2. xxxx -3. xxxx - -#### Contribution - -1. Fork the repository -2. Create Feat_xxx branch -3. Commit your code -4. Create Pull Request - - -#### Gitee Feature - -1. You can use Readme\_XXX.md to support different languages, such as Readme\_en.md, Readme\_zh.md -2. Gitee blog [blog.gitee.com](https://blog.gitee.com) -3. Explore open source project [https://gitee.com/explore](https://gitee.com/explore) -4. The most valuable open source project [GVP](https://gitee.com/gvp) -5. The manual of Gitee [https://gitee.com/help](https://gitee.com/help) -6. The most popular members [https://gitee.com/gitee-stars/](https://gitee.com/gitee-stars/) diff --git a/README.md b/README.md index 22dfc7d..f5eb8fa 100644 --- a/README.md +++ b/README.md @@ -12,4 +12,4 @@ C语言实现思路： | --- | --- | --- | --- | | 匿名结构体 | 指针 | 多重继承，成员可能冲突 | B->A, C->A, D->B,D->C| | 虚函数表 | 指针 | 子类父类必须将虚表放在结构体最开头，且不支持多继承下的多态 | | -| 虚函数多参数 | 指针 | 继承的父类无顺序强制要求，且可以多继承。但类方法参数变多 | | +| 虚函数多参数 | 指针 | 继承的父类无顺序强制要求，且可以多继承。但类方法参数变多。多继承需要人为注意是调用了其他类还是继承了其他类 | | diff --git a/main.c b/main.c index 8945162..6e224e8 100644 --- a/main.c +++ b/main.c @@ -120,7 +120,8 @@ double rect_area(void *self, void *parent) void rect_draw(void *self, void *parent) { - printf("rect draw\n"); + struct _rect *pthis = (struct _rect *)parent; + pthis->shape->vtb.draw(self, NULL); } double _rect_area(void *self, void *parent) @@ -181,13 +182,27 @@ struct _circle // void (*draw)(void *self); }; -double circle_area(struct _circle *self, void *parent) +double circle_area(void *self, void *parent) { - double area = 3.14 * self->radius * self->radius; + double area = 0; + struct _circle *pthis = (struct _circle *)parent; + area = pthis->shape->vtb.area(self, NULL); + return area; +} +void circle_draw(void *self, void *parent) +{ + struct _circle *pthis = (struct _circle *)parent; + pthis->shape->vtb.draw(self, NULL); +} + +double _circle_area(void *self, void *parent) +{ + struct _circle *pthis = (struct _circle *)self; + double area = 3.14 * pthis->radius * pthis->radius; printf("circle area = %0.2f\n", area); return area; } -void circle_draw(struct _circle *self, void *parent) +void _circle_draw(void *self, void *parent) { printf("circle draw\n"); } @@ -196,8 +211,8 @@ struct _circle *circle_new(double radius) { // super static struct _virtual_table vtb = { - .area = (double (*)(void *self, void *parent))circle_area, - .draw = (void (*)(void *self, void *parent))circle_draw, + .area = (double (*)(void *self, void *parent))_circle_area, + .draw = (void (*)(void *self, void *parent))_circle_draw, }; struct _shape *shape = shape_new(); @@ -231,8 +246,14 @@ struct _copper_cash double copper_cash_area(struct _copper_cash *self, void *parent) { - double circle_area = self->circle->shape->vtb.area(self->circle, self->circle); - double rect_area = self->rect->shape->vtb.area(self->rect, self->rect); + // 如果用的继承，那么就不能直接调用父类的虚接口，实现自己。 + // 因为父类虚接口，是自己实现的。这样相当于自己调用自己。导致卡死。 + + // double circle_area = self->circle->shape->vtb.area(self->circle, self->circle); + // double rect_area = self->rect->shape->vtb.area(self->rect, self->rect); + + double circle_area = 3.14 * self->circle->radius * self->circle->radius; + double rect_area = self->rect->width * self->rect->height; double area = circle_area - rect_area; printf("copper cash area = %0.2f\n", circle_area - rect_area); @@ -265,12 +286,14 @@ struct _copper_cash *copper_cash_new(double width, double height, double radius) { return NULL; } + rect->shape = shape; struct _circle *circle = circle_new(radius); if (circle == NULL) { return NULL; } + circle->shape = shape; // self struct _copper_cash *cc = calloc(1, sizeof(struct _copper_cash)); @@ -324,6 +347,10 @@ int main(int argc, char *argv[]) printf("----- [2] copper_cash -----\n"); rect_area(cc, cc->rect); + rect_draw(cc, cc->rect); + + circle_area(cc, cc->circle); + circle_draw(cc, cc->circle); return 0; }