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打卡:4.21 C语言篇 -(1)初识C语言 - (11)关键字register,#define定义的宏

C语言篇 -(1)初识C语言 - (11)关键字register,#define定义的宏

🔥register

int main()
{
	int num = 5;

	return 0;
}
int main()
{
	register int num = 5;

	return 0;
}

🔥#define定义的宏

#define Num 1

int main()
{
	int num = Num;

	printf("%d\n", num);
	printf("%d\n", Num);

}
int Add(int x, int y)
{
	return x + y;

}

int main()
{
	int a = 4;
	int b = 5;

	int sum = Add(a, b);
	//求和

	printf("%d", sum);
	return 0;
}
#define ADD(x,y) ((x)+(y))

int main()
{
	int a = 4;
	int b = 5;

	int sum = ADD(a, b);
	//求和

	printf("%d", sum);
	return 0;
}
int main()
{
	int a = 4;
	int b = 5;

	int sum = ((a)+(b));
	//求和

	printf("%d", sum);
	return 0;
}
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