Java学习的第四十天

1.例4.1在其他函数中调用主函数

package bgio;
public class cjava {
    public static void main(String[] args) {
printstar();
print_message();
printstar();
    }
    static void printstar()
    {
        System.out.println("*******************");
    }
    static void print_message() {
        System.out.println("Weclome to java!");
    }
}

 例4.2调用函数时的数据传递

import java.util.Scanner;
public class cjava {
    public static void main(String[] args) {
int a,b,c;
System.out.println("please enter two integer number:");
Scanner s=new Scanner(System.in);
a=s.nextInt();
b=s.nextInt();
c=max(a,b);
System.out.println("max="+c);
    }
    static int max(int x,int y) {
        int z;
        z=x>y?x:y;
        return z;
    }
}

 例4.3对被调用的函数声明

import java.util.Scanner;
public class cjava {
    public static void main(String[] args) {
float a,b,c;
System.out.println("please enter a,b:");
Scanner s=new Scanner(System.in);
a=s.nextInt();
b=s.nextInt();
c=add(a,b);
System.out.println("和为:"+c);
    }
    static float add(float x,float y) {
        float z;
        z=x+y;
        return z;
    }
}

 2.没问题

3.明天继续写例题。