博客

学生成绩管理系统

import java.util.Scanner;

class Student{


Student(){

}
Student (String stuNo, String stuName, String gender, byte age, int score){
	this.stuNo   = stuNo;
	
	this.stuName = stuName;
	
	this.gender  = gender;
	
	this.age     =  age;
	
	this.score   =  score;
	
}

String stuNo;

String stuName;

String gender;

byte   age;

int    score;

}

class StuData{

Student stuArray[] = new Student[10];
int dataindex = 0;

void insertStu(Student stu){
	if(dataindex == stuArray.length){
		Student newArray[] = new Student[stuArray.length + (stuArray.length >> 1)];
		for(int i = 0; i<dataindex; i++){
			newArray[i] = stuArray[i];
		}
		stuArray = newArray;///赋值时不用加[]
	}
	stuArray[dataindex] = stu;
	dataindex++;
	
}

Student checkStuNo(String stuNo){
	for(int i = 0; i < dataindex; i++){
		if(stuArray[i].stuNo.equals(stuNo)) ///.equals
		{
			return stuArray[i]; 
		}
	}
	return null;
}

void delateStu(String stuNo){///错误：找不到符号 有可能是大小写的问题，只要双击不论大小写只要拼写相同就变绿
	boolean flag = false;
	for(int i = 0; i < dataindex; i++){
		if (stuArray[i].stuNo.equals(stuNo)){
			stuArray[i] = stuArray[i + 1];
			flag = true;
		}
	}
	if(flag){
			dataindex--;
		}
	
}

void updateSt