如何为结构创建打印功能？ [英] How do I creat a print function for structure?

问题描述

我尝试为结构制作打印功能，但遇到了我以前没看过的错误

这是我的鳕鱼：

I try to make a print function for structure but meet a errow I have not seem before
this is my cod:

   #include<stdio.h>
   struct point{
	int x;
	int y;
   }p;
   
    int main()
   {
        struct point scan(struct point *p);
	void print(struct point *p);
	
		
	scan(&p);
	print(&p);
	
	 
	
	return 0;
}
     struct point scan(struct point *p)
{
	scanf("%d%d",p->x,p->y); 
}

      void print(struct point *p)
{
	printf("%d%d",p->x,p->y);
}

我尝试过：



我搜索了谷歌但没有发现什么。

顺便说一下，如果你认为我的问题很愚蠢，请为我推荐一些书，我会很感激的。

What I have tried:

I have searched google but nothing found nothing.
By the way,if you think my question is stupid,please recommend some book for me, I will appreciate that.

推荐答案

你不能在函数体内声明函数原型。将这些行移到 main 的定义之上：

You cannot declare function prototypes inside the body of a function. Move these lines above the definition of main:

struct point scan(struct point *p);
	void print(struct point *p);

并帮自己一个忙，不要使用单个字符名称：使用正确的名称，你的代码变得更容易阅读。

And do yourself a favour, and don't use single character names: use "proper" names and your code becomes a lot easier to read.

#include<stdio.h>
struct point
   {
   int x;
   int y;
   } myPoint;

struct point scan(struct point *p);
void print(struct point *p);
   
int main()
   {
   scan(&myPoint);
   print(&myPoint);
   return 0;
   }
   
struct point scan(struct point *p)
   {
   scanf("%d%d",p->x,p->y); 
   }
void print(struct point *p)
   {
   printf("%d%d",p->x,p->y);
   }

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