目录

Show 例子

还有其他一些重要的运算符,包括sizeof? : ? : D语言支持。

操作者 描述
sizeof() 返回变量的大小。 sizeof(a),其中a是整数,返回4。
& 返回变量的地址。 &一个; 给出变量的实际地址。
*Pointer to a variable. *一个; 给出一个变量的指针。
? : 条件表达式 如果condition为true则为值X:否则为Y.

例子 (Example)

请尝试以下示例来了解D编程语言中可用的所有其他运算符 -

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\n", a.sizeof ); 
   writefln("Line 2 - Size of variable b = %d\n", b.sizeof ); 
   writefln("Line 3 - Size of variable c= %d\n", c.sizeof );  
   /* example of & and * operators */ 
   ptr = &a; /* 'ptr' now contains the address of 'a'*/ 
   writefln("value of a is  %d\n", a); 
   writefln("*ptr is %d.\n", *ptr);  
   /* example of ternary operator */ 
   a = 10; 
   b = (a == 1) ? 20: 30; 
   writefln( "Value of b is %d\n", b ); 
   b = (a == 10) ? 20: 30; 
   writefln( "Value of b is %d\n", b ); 
   return 0; 
} 

编译并执行上述程序时,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
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