bigcalculator.java

java开发的大整数计算器,实现基本的运算,还有sin,cos,tan,cot.

	}

	public void output2()
	{
		formulaLabel.setText(str1);
	}

	public String evaluate(String s1,String s3,String s2)
	{            
		String st = "";

		if(!s3.equals(new String("sin"))&&!s3.equals(new String("cos"))
				&&!s3.equals(new String("tan"))&&!s3.equals(new String("cot")))
		{ 
			c1 = s1.charAt(0);c2 = s2.charAt(0);
			int a3[] = new int[100];
			int m = s1.length(), n = s2.length();

			if(c1 != '-' && c2 != '-')
			{
				int a1[] = new int[m];
				int a2[] = new int[n];

				for(int i=0;i<m;i++)
				{
					String temp1 = String.valueOf(s1.charAt(i));
					a1[i] = Integer.parseInt(temp1);
				}

				for(int i=0;i<n;i++)
				{
					String temp2 = String.valueOf(s2.charAt(i));
					a2[i] = Integer.parseInt(temp2);
				}

				if(s3.equalsIgnoreCase("+"))

					a3 = LongInteger.add(a1,a2);

				else if(s3.equalsIgnoreCase("-"))

					a3 = LongInteger.subtract(a1,a2);

				else if(s3.equalsIgnoreCase("×"))

					a3 = LongInteger.multiply(a1,a2);

				else if(s3.equalsIgnoreCase("/"))

					a3 = LongInteger.divide(a1,a2);

				else if(s3.equalsIgnoreCase("^"))

					a3 = LongInteger.pow(a1,a2);                	

				for(int i=0;i<a3.length;i++)
					st += String.valueOf(a3[i]);            	
			}   
			else if(c1 == '-' && c2 != '-')
			{
				int a4[] = new int[m-1];
				int a5[] = new int[n];

				for(int i=1;i<m;i++)
				{
					String temp1 = String.valueOf(s1.charAt(i));
					a4[i-1] = Integer.parseInt(temp1);             
				}

				for(int i=0;i<n;i++)
				{
					String temp2 = String.valueOf(s2.charAt(i));
					a5[i] = Integer.parseInt(temp2);
				}    

				if(s3.equalsIgnoreCase("+"))
				{
					if(m-1>n)
					{
						a3 = LongInteger.subtract(a4,a5);
						st = "-";
						for(int i=0;i<a3.length;i++)
							st += String.valueOf(a3[i]); 
					}
					else
					{
						a3 = LongInteger.subtract(a5,a4);

						for(int i=0;i<a3.length;i++)
							st += String.valueOf(a3[i]); 
					}
				}
				else
				{
					if(s3.equalsIgnoreCase("-"))

						a3 = LongInteger.add(a4,a5);

					else if(s3.equalsIgnoreCase("×"))

						a3 = LongInteger.multiply(a4,a5);

					else if(s3.equalsIgnoreCase("/"))

						a3 = LongInteger.divide(a4,a5);

					st = "-";

					for(int i=0;i<a3.length;i++)
						st += String.valueOf(a3[i]);
				}                 
			}
			else if(c1 == '-' && c2 == '-')
			{           
				int a6[] = new int[m-1];
				int a7[] = new int[n-1];

				for(int i=1;i<m;i++)
				{
					String temp1 = String.valueOf(s1.charAt(i));
					a6[i-1] = Integer.parseInt(temp1);                  
				}

				for(int i=1;i<n;i++)
				{
					String temp2 = String.valueOf(s2.charAt(i));
					a7[i-1] = Integer.parseInt(temp2);
				} 

				if(s3.equalsIgnoreCase("+"))
				{
					a3 = LongInteger.add(a6,a7);
					st = "-";
					for(int i=0;i<a3.length;i++)
						st += String.valueOf(a3[i]); 
				}
				else if(s3.equalsIgnoreCase("-"))
				{
					if(m-1>n-1)
					{
						a3 = LongInteger.subtract(a6,a7);
						st = "-";
						for(int i=0;i<a3.length;i++)
							st += String.valueOf(a3[i]);                        
					}
					else
					{
						a3 = LongInteger.subtract(a7,a6);
						for(int i=0;i<a3.length;i++)
							st += String.valueOf(a3[i]); 
					}
				}
				else
				{               
					if(s3.equalsIgnoreCase("×"))
						a3 = LongInteger.multiply(a6,a7);
					else if(s3.equalsIgnoreCase("/"))
						a3 = LongInteger.divide(a6,a7);               
					for(int i=0;i<a3.length;i++)
						st += String.valueOf(a3[i]);            	  
				}
			}

			else if(c1 != '-' && c2 == '-')
			{
				int a8[] = new int[m];
				int a9[] = new int[n-1];

				for(int i=0;i<m;i++)
				{
					String temp1 = String.valueOf(s1.charAt(i));
					a8[i] = Integer.parseInt(temp1);
				}

				for(int i=1;i<n;i++)
				{
					String temp2 = String.valueOf(s2.charAt(i));
					a9[i-1] = Integer.parseInt(temp2);
				}

				if(s3.equalsIgnoreCase("+"))
				{
					a3 = LongInteger.subtract(a8,a9);

					for(int i=0;i<a3.length;i++)
						st += String.valueOf(a3[i]);
				}
				else if(s3.equalsIgnoreCase("-"))
				{
					a3 = LongInteger.add(a8,a9);

					for(int i=0;i<a3.length;i++)
						st += String.valueOf(a3[i]);
				}
				else
				{
					if(s3.equalsIgnoreCase("×"))

						a3 = LongInteger.multiply(a8,a9);

					else if(s3.equalsIgnoreCase("/"))

						a3 = LongInteger.divide(a8,a9);

					st = "-";

					for(int i=0;i<a3.length;i++)
						st += String.valueOf(a3[i]);
				}
			}
		}
		else
		{
			double in = 0,result = 0; 
			in = Double.parseDouble(s1);

			if(s3.equalsIgnoreCase("sin"))

				result = Math.sin(in*((2*pi)/360));

			else if(s3.equalsIgnoreCase("cos"))

				result = Math.cos(in*((2*pi)/360));

			else if(s3.equalsIgnoreCase("tan"))

				result = Math.tan(in*((2*pi)/360));	 

			else if(s3.equalsIgnoreCase("cot"))

				result = 1/Math.tan(in*((2*pi)/360));

			st = String.valueOf(result);
		}   
		return(st);         
	}

	public int fuzhi(String st)
	{
		int in2 = 10;

		if(st.equalsIgnoreCase("+"))
			in2 = 1;
		else if(st.equalsIgnoreCase("-"))
			in2 = 1;
		else if(st.equalsIgnoreCase("×"))
			in2 = 2;
		else if(st.equalsIgnoreCase("/"))
			in2 = 2;
		else if(st.equalsIgnoreCase("^"))
			in2 = 2;
		else if(st.equalsIgnoreCase("sin"))
			in2 = 3;
		else if(st.equalsIgnoreCase("cos"))
			in2 = 3;
		else if(st.equalsIgnoreCase("tan"))
			in2 = 3;
		else if(st.equalsIgnoreCase("cot"))	
			in2 = 3;	 
		else if(st.equalsIgnoreCase("("))
			in2 = 0;
		else if(st.equalsIgnoreCase(")"))
			in2 = 4;
		else if(st.equalsIgnoreCase("="))
			in2 = 5;
		return(in2);

	}

	public void backSpace()
	{
		try
		{
			if(fuzhi(str5) == 3)
			{
				myStack2.pop();
				str1 = "";       
				output2();
			}
			else
			{
				if(str5.equalsIgnoreCase("0")||str5.equalsIgnoreCase("1")||str5.equalsIgnoreCase("2")||
						str5.equalsIgnoreCase("3")||str5.equalsIgnoreCase("4")||str5.equalsIgnoreCase("5")||
						str5.equalsIgnoreCase("6")||str5.equalsIgnoreCase("7")||str5.equalsIgnoreCase("8")||
						str5.equalsIgnoreCase("9"))
				{
					if(str2.length() == 1)
						str2 = "";
					else
						str2 = str2.substring(0,str2.length()-1);              
				}
				else
				{           
					copystack(myStack3,myStack1);
					copystack(myStack4,myStack2);            
				}

				str1 = str1.substring(0,str1.length()-1);

				output1();
				output2();  
			}
		}
		catch(Exception r){}
	}

	public void copystack(SeqStack stkaim,SeqStack stkto)
	{
		try
		{
			SeqStack myStack5 = new SeqStack();
			SeqStack myStack6 = new SeqStack();
			stkto.top = 0;

			while(!stkaim.isEmpty())
			{
				myStack5.push(stkaim.getTop());
				myStack6.push(stkaim.pop());
			}

			while(!myStack5.isEmpty() && !myStack6.isEmpty())
			{
				stkto.push(myStack5.pop());
				stkaim.push(myStack6.pop());
			}
		}
		catch(Exception q){}
	}

	public void keyPressed(KeyEvent e)
	{
		System.out.println("keyPressed:"+e.getKeyCode());

		for(int i = 0;i < 10;i++)
		{
			if(e.getKeyCode() == i + 48)
			{
				System.out.println("keyPressed:"+e.getKeyCode());   
				input1(Integer.toString(i));
				input2(Integer.toString(i));   
				output1();
				output2();
			}
		}

		if(e.getKeyCode() == 10)
		{
			input1("=");
			output1();
			str1 = "";
			myStack1.top = 0;
		}
	}

	public void keyReleased(KeyEvent arg0){}

	public void keyTyped(KeyEvent arg0){}    
}