学生成绩管理系统

[java]代码库

package com.student.www;

import java.util.Scanner;

public class StudentCJInput {

	String[][] studentcjs = null;// 所有学生的成绩数组对应每个学生
	String studentNames[] = null;// 所有学生数组
	String[] cjs = null;// 科目数组

	int studentNum = 0;// 学生数
	int keNum = 0;// 学生科目数
	Scanner scanner;// 监听系统输入

	public StudentCJInput(int sNum, int keNum) {
		scanner = new Scanner(System.in);
		this.studentNum = sNum;
		this.keNum = keNum;
		showCJ();
	}

	/**
	 * 输入成绩
	 * 
	 */
	void showCJ() {
		studentNames = new String[studentNum];
		studentcjs = new String[studentNum][keNum];
		cjs = new String[keNum];
		System.out.println("请依次输入所有学科：");
		for (int xk = 0; xk < cjs.length; xk++) {
			System.out.println("请输入第" + (xk + 1) + "门学科名:");
			String xkName = scanner.next();
			cjs[xk] = xkName;
		}
		for (int name = 0; name < studentNames.length; name++) {
			System.out.println("请输入第" + (name + 1) + "个学生的姓名:");
			String sName = scanner.next();
			studentNames[name] = sName;
			String[] scjNum = studentcjs[name];
			for (int yxk = 0; yxk < cjs.length; yxk++) {
				System.out.println("请输入" + cjs[yxk] + "的成绩:");
				String cNum = scanner.next();
				scjNum[yxk] = cNum;
			}
		}
		print();
	}

	/**
	 * 打印
	 */
	private void print() {
		System.out.println("所有学生的成绩单:");
		System.out.print("\t");
		printStudentName();
		printCJNUM();
		printZCJ();
		printPJCJ();
		printJB();		
	}

	/**
	 * 打印学生姓名
	 */
	private void printStudentName() {
		for (int i = 0; i < studentNames.length; i++) {
			System.out.print(studentNames[i] + "\t");
		}
	}

	/**
	 * 打印成绩分数
	 */
	private void printCJNUM() {
		for (int i = 0; i < cjs.length; i++) {
			System.out.print("\n" + cjs[i] + "\t");
			for (int j = 0; j < studentNames.length; j++) {
				String[] cj = studentcjs[j];
				for (int l = 0; l < cj.length; l++) {
					if (l == i) {
						System.out.print(cj[l] + "\t");
					}
				}
			}
		}
	}

	/**
	 * 打印总成绩
	 */
	private void printZCJ() {
		System.out.println();
		System.out.print("总成绩\t");
		for (int i = 0; i < studentNames.length; i++) {
			String cj[] = studentcjs[i];
			int cjNum = 0;
			for (int j = 0; j < cj.length; j++) {
				cjNum += Integer.parseInt(cj[j]);
			}
			System.out.print((cjNum) + "\t");
		}
	}

	/**
	 * 平均成绩打印
	 */
	private void printPJCJ() {
		System.out.println();
		System.out.print("平均成绩\t");
		for (int i = 0; i < studentNames.length; i++) {
			String cj[] = studentcjs[i];
			int cjNum = 0;
			for (int j = 0; j < cj.length; j++) {
				cjNum += Integer.parseInt(cj[j]);
			}
			System.out.print((cjNum / cj.length) + "\t");
		}
	}

	/**
	 * 打印级别
	 */
	public void printJB() {
		System.out.println();
		System.out.print("评级\t");
		for (int i = 0; i < studentNames.length; i++) {
			String cj[] = studentcjs[i];
			int cjNum = 0;
			for (int j = 0; j < cj.length; j++) {
				cjNum += Integer.parseInt(cj[j]);
			}
			String ylc = getJi(cjNum / cj.length);
			System.out.print(ylc + "\t");
		}
	}

	/**
	 * 获得级别差
	 * 
	 * @param i
	 * @return
	 */
	public final static String Y = "优";
	public final static String L = "良";
	public final static String C = "差";
	public final static String BJG = "不及格";

	private String getJi(int ylc) {
		if (ylc < 60) {
			return BJG;
		} else if (ylc >= 60 && ylc < 70) {
			return C;
		} else if (ylc >= 70 && ylc < 90) {
			return L;
		} else if (ylc >= 90 && ylc <= 100) {
			return Y;
		}
		return BJG;
	}

}








package com.student.www;

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		System.out.println("请输入学生数:");
		int snum = scanner.nextInt();
		System.out.println("请输入科目数:");
		int knum = scanner.nextInt();
		StudentCJInput studentCJInput = new StudentCJInput(snum, knum);
	}
}