D语言的支持还有其他一些重要的运算符,包括的sizeof和? :。
运算符 | 描述 | 示例 |
---|---|---|
sizeof | 返回一个变量的大小。 | a.sizeof, 其中a是整数,将返回4。 |
& | 返回一个变量的地址。 | &a 将得到的变量actaul地址。 |
* | 指向变量的指针。 | *a 指针变量。 |
? : | 条件表达式 | If Condition is true ? Then value X : Otherwise value Y |
示例
试试下面的例子就明白了所有的D编程语言杂运算符:
import std.stdio int main(string[] args) { int a = 4 short b double c int* ptr /* example of sizeof operator */ writefln("Line 1 - Size of variable a = %d ", a.sizeof ) writefln("Line 2 - Size of variable b = %d ", b.sizeof ) writefln("Line 3 - Size of variable c= %d ", c.sizeof ) /* example of & and * operators */ ptr = &a /* &aposptr&apos now contains the address of &aposa&apos*/ writefln("value of a is %d ", a) writefln("*ptr is %d. ", *ptr) /* example of ternary operator */ a = 10 b = (a == 1) ? 20: 30 writefln( "Value of b is %d ", b ) b = (a == 10) ? 20: 30 writefln( "Value of b is %d ", b ) return 0 }
当编译并执行上面的程序它会产生以下结果:
value of a is 4 *ptr is 4. Value of b is 30 Value of b is 20