package cn.edu.bjut.chapter3;

public class ParameterTester {
	static void add(double x, double y) {
		double z;
		z = x + y;
		System.out.println("z = " + z);
		x = x + 3.2;
		y = y + 1.2;
		System.out.println("x = " + x + "\ty = " + y);
	}

	static double add2(double y1, double y2) {
		double z;
		z = y1 + y2 + 2.9;
		return z;
	}

	public static void main(String[] args) {
		int a = 2, b = 7;
		double f1 = 2, f2 = 4, f3;
		add(a, b);// 按Java的类型转换规则达到形参类型
		System.out.println("a = " + a + "\tb = " + b);
		// f3 = add2(f1, f2, 3.5)；错，实参与形参参数个数不一致
		f3 = 2 + add2(f1, f2);
		System.out.println("f1 = " + f1 + "\tf2 = " + f2 + "\tf3 = " + f3);
	}
}