设计模式DP-外观模式

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

// 定义子系统A
typedef struct subsystemA {
	void (*operationA)(struct subsystemA* subsystem);
} SubsystemA;
// 定义子系统B
typedef struct subsystemB {
	void (*operationB)(struct subsystemB* subsystem);
} SubsystemB;
// 定义子系统C
typedef struct subsystemC {
	void (*operationC)(struct subsystemC* subsystem);
} SubsystemC;
// 定义外观
typedef struct facade {
	SubsystemA subsystemA;
	SubsystemB subsystemB;
	SubsystemC subsystemC;
	void (*operation)(struct facade* facade);
} Facade;
// 实现子系统A的操作
void operationA(SubsystemA* subsystem) {
	printf("SubsystemA operation.\n");
}
// 实现子系统B的操作
void operationB(SubsystemB* subsystem) {
	printf("SubsystemB operation.\n");
}
// 实现子系统C的操作
void operationC(SubsystemC* subsystem) {
	printf("SubsystemC operation.\n");
}
// 实现外观的操作
void operation(Facade* facade) {
	facade->subsystemA.operationA(&facade->subsystemA);
	facade->subsystemB.operationB(&facade->subsystemB);
	facade->subsystemC.operationC(&facade->subsystemC);
}

int main(int argc, char *argv[])
{
	Facade facade;
	facade.subsystemA.operationA = operationA;
	facade.subsystemB.operationB = operationB;
	facade.subsystemC.operationC = operationC;
	facade.operation = operation;
	facade.operation(&facade);
	return 0;
}

• ()[https://zhuanlan.zhihu.com/p/637760241]
• ()[https://blog.csdn.net/lbaihao/article/details/117820088]
• ()[https://blog.csdn.net/feixiaoxing/article/details/7100334]