How to realize the simple Student Achievement system by Java
< 5; i++){ if(a[i].getStunumber().equals(m)) { x.inMath(a[i]); double d1 = in.nextDouble(); a[i].setMath(d1); x.inEng(a[i]); double d2 = in.nextDouble(); a[i].setEng(d2); x.inNet(a[i]); double d3 = in.nextDouble(); a[i].setNet(d3); x.inData(a[i]); double d4 = in.nextDouble(); a[i].setData(d4); x.inSoft(a[i]); double d5 = in.nextDouble(); a[i].setSoft(d5); x.inall(a[i]); String c = in.next(); if(c.equals("N")){ a[i].setMath(0); a[i].setEng(0); a[i].setNet(0); a[i].setData(0); a[i].setSoft(0); } x.mainsur(); temp1 = 1; break; } } if(temp1 == 0) { System.out.println("该学号不存在"); x.mainsur(); } } public void stem2(ScoreInformation a[]){ //执行学生成绩修改操作。 int temp1 = 0; double r1,r2,r3,r4,r5; x.changeStun(); String m = in.next(); for(int i = 0; i < 5; i++){ if(a[i].getStunumber().equals(m)) { r1 = a[i].getMath(); r2 = a[i].getEng(); r3 = a[i].getNet(); r4 = a[i].getData(); r5 = a[i].getSoft(); x.outscore(a[i]); int c = in.nextInt(); switch(c){ case 1: x.changeMath(a[i]); double d1 = in.nextDouble(); a[i].setMath(d1); break; case 2: x.changeEng(a[i]); double d2 = in.nextDouble(); a[i].setEng(d2); break; case 3: x.changeNet(a[i]); double d3 = in.nextDouble(); a[i].setNet(d3); break; case 4: x.changeData(a[i]); double d4 = in.nextDouble(); a[i].setData(d4); break; case 5: x.changeSoft(a[i]); double d5 = in.nextDouble(); a[i].setSoft(d5); break; default: System.out.println("无该选项，返回主界面"); x.mainsur(); break; } x.overchange(a[i]); String h = in.next(); if(h.equals("N")){ a[i].setMath(r1); a[i].setEng(r2); a[i].setNet(r3); a[i].setData(r4); a[i].setSoft(r5); } x.mainsur(); temp1 = 1; break; } } if(temp1 == 0) { System.out.println("该学号不存在"); x.mainsur(); } } public void stem3(ScoreInformation a[]){ //执行绩点计算操作 Main v = new Main(); double R; double r1,r2,r3,r4,r5; double x1,x2,x3,x4,x5; x.startgrade(); String m = in.next(); for(int i = 0; i < 5; i++){ if(a[i].getStunumber().equals(m)) { r1 = a[i].getMath();x1 = v.Gpoint(r1); r2 = a[i].getEng();x2 = v.Gpoint(r2); r3 = a[i].getNet();x3 = v.Gpoint(r3); r4 = a[i].getData();x4 = v.Gpoint(r4); r5 = a[i].getSoft();x5 = v.Gpoint(r5); R = (x1*r1+x2*r2+x3*r3+x4*r4+x5*r5)/(r1+r2+r3+r4+r5); if(R>
= 2) {x.endscore1 (a [I], R);} else {x.endscore2 (a [I], R);} String Q = in.next (); if (q.equals ("Y")) {x.mainsur ();} break } public double Gpoint (double d) {/ / return credits corresponding to double e = 0; if (d > = 90.0) e = 4.0; else if (d > = 85&&d=82&&d=78&&d=75&&d=72&&d=68&&d=66&&d=64&&d=60&&d)
