不含指针的结构体赋值实现，直接内存拷贝

#include <stdio.h>
#include <stdlib.h>

struct A {
	int c;
	char b[20];
	char strs[10][10];
	int k;
};

int main() {
	//  A a = {...}; // 帮我初始化
	struct A a = {
		1, // Initialize c with some integer
		"Example String", // Initialize b with a string (fewer than 20 characters)
		{ // Initialize strs with strings (each fewer than 10 characters)
			"String1", // First string
			"String2", // Second string
			"String3", // Third string
			// You can initialize more or leave them empty which will default to zeros
		},
		42 // Initialize k with some integer
	};
	struct A b;
	b = a;
	printf("b.strs[0]=%s\n", b.strs[0]);
}

　　

 

看下 b = a 的反汇编结果：

	struct A b;
	b = a;
009C18E0  mov         ecx,20h  
009C18E5  lea         esi,[a]  
009C18EB  lea         edi,[b]  
009C18F1  rep movs    dword ptr es:[edi],dword ptr [esi]  
	printf("b.strs[0]=%s\n", b.strs[0]);

　　

sizeof(A)  =  128 ==  20h*4（dword）