D 编程 - 赋值运算符



D 语言支持以下赋值运算符:

运算符 描述 示例
= 这是简单的赋值运算符。它将右侧操作数的值赋给左侧操作数。 C = A + B 将 A + B 的值赋给 C
+= 这是加法并赋值运算符。它将右侧操作数加到左侧操作数,并将结果赋给左侧操作数。 C += A 等效于 C = C + A
-= 这是减法并赋值运算符。它从左侧操作数减去右侧操作数,并将结果赋给左侧操作数。 C -= A 等效于 C = C - A
*= 这是乘法并赋值运算符。它将右侧操作数乘以左侧操作数,并将结果赋给左侧操作数。 C *= A 等效于 C = C * A
/= 这是除法并赋值运算符。它将左侧操作数除以右侧操作数,并将结果赋给左侧操作数。 C /= A 等效于 C = C / A
%= 这是取模并赋值运算符。它使用两个操作数进行取模运算,并将结果赋给左侧操作数。 C %= A 等效于 C = C % A
<<= 这是左移并赋值运算符。 C <<= 2 等效于 C = C << 2
>>= 这是右移并赋值运算符。 C >>= 2 等效于 C = C >> 2
&= 这是按位与并赋值运算符。 C &= 2 等效于 C = C & 2
^= 这是按位异或并赋值运算符。 C ^= 2 等效于 C = C ^ 2
|= 这是按位或并赋值运算符。 C |= 2 等效于 C = C | 2

示例

尝试以下示例以了解 D 编程语言中所有可用的赋值运算符:

import std.stdio;

int main(string[] args) {
   int a = 21;
   int c ;

   c =  a; 
   writefln("Line 1 - =  Operator Example, Value of c = %d\n", c );  
   
   c +=  a; 
   writefln("Line 2 - += Operator Example, Value of c = %d\n", c );
   
   c -=  a; 
   writefln("Line 3 - -= Operator Example, Value of c = %d\n", c );
   
   c *=  a; 
   writefln("Line 4 - *= Operator Example, Value of c = %d\n", c ); 
   
   c /=  a; 
   writefln("Line 5 - /= Operator Example, Value of c = %d\n", c );  
   
   c  = 200; 
   c = c % a; 
   writefln("Line 6 - %s= Operator Example, Value of c = %d\n",'\x25', c );
   
   c <<=  2; 
   writefln("Line 7 - <<= Operator Example, Value of c = %d\n", c ); 
   
   c >>=  2; 
   writefln("Line 8 - >>= Operator Example, Value of c = %d\n", c );
   
   c &=  2; 
   writefln("Line 9 - &= Operator Example, Value of c = %d\n", c ); 
   
   c ^=  2; 
   writefln("Line 10 - ^= Operator Example, Value of c = %d\n", c ); 
   
   c |=  2; 
   writefln("Line 11 - |= Operator Example, Value of c = %d\n", c );
   
   return 0; 
}

编译并执行上述程序后,将产生以下结果:

Line 1 - =  Operator Example, Value of c = 21
  
Line 2 - += Operator Example, Value of c = 42
  
Line 3 - -= Operator Example, Value of c = 21
  
Line 4 - *= Operator Example, Value of c = 441
  
Line 5 - /= Operator Example, Value of c = 21 
 
Line 6 - %= Operator Example, Value of c = 11
  
Line 7 - <<= Operator Example, Value of c = 44 
 
Line 8 - >>= Operator Example, Value of c = 11 
 
Line 9 - &= Operator Example, Value of c = 2

Line 10 - ^= Operator Example, Value of c = 0 
 
Line 11 - |= Operator Example, Value of c = 2
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