char数组的嵌套结构 [英] Nested structure to char array

问题描述

嗨我想在c编程中使用sprintf函数将嵌套结构转换为char数组。

hi i am trying to convert the nested structure to char array using sprintf function in c programming.

struct date_of_birth{
	int dd,mm,yy;
};

struct student{
	char name[30];
	int rollNumber;
	date_of_birth dob;
};
int main()
{
// to make a single char aray using sprintf()
char arr[100];
  
}

我的尝试：



你能告诉我哪个循环将继续学生或dob以形成字符数组？

What I have tried:

can you please let me which loop will continue first either student or dob to form char array?

推荐答案

如果你需要序列化 [ ^ ] struct 然后 memcpy [ ^ ]是要走的路

If you need to serialize[^] the struct then memcpy[^] is the way to go

student s;
char a[100];
memcpy(a, &s, sizeof(s));

[更新]修复了错误，感谢 K5054 [/ update]。

[update]Fixed a blunder, thanks to K5054[/update].

一种方式：

One way :

void GetStudentDataString( student * ps )
{
   const int bufferSize = 127;
   char buffer[bufferSize+1] = {0};

   snprintf( buffer, bufferSize, "%s, %d, %02d:%02d:%02d",
             ps->name, ps->rollNumber, ps->yy, ps->mm, ps->dd );
}

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