D语言赋值运算符

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; 
}