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;
}