legal-4

用Java实现的编译器。把源代码编译成SPARC汇编程序

class Program
{

  void m0()
  {}

  int m2(int i)
  {
  	if (i<=1) {
		return 1;
	} else {
		return m2(i-1)*i;
	}
  } 

  int m1(int i) {
  	return m2(i+1);
  }

  void main()
  {
     int i;
     m0();

     i = m2(5);
     callout("printf","first method call, should return 120: %d\n",i);

     i = m1(4);
     callout("printf","second method call, should return 120: %d\n",i);

     callout("printf","nested procedure calls, should return 5040: %d\n",
             m1(m1(m1(1))));

     i = m1(m2(3)+1);
     callout("printf","factorial of 8, should be 40320: %d\n", i);
  }
}