//演示方法重載
public class OverLoad {
	  int  i = 3, j=4;
	  int sum( ){
	  return i+j;
	  }		
	  int sum(int a, int b) {
	      return a+b;
	    }
	  int sum(int a,int b, int c){
	  return a+b+c;
	  }
	  double sum(double a, double b){
	  return a+b;
	  }
	  public static void main(String []args){
		 OverLoad o = new OverLoad();
		 System.out.println(o.sum());
		 System.out.println(o.sum(5,6));
		 System.out.println(o.sum(5,8,4));
		 System.out.println(o.sum(3.2,2.15));
	 }
}