C学生成绩标准管理系统源代码

#include<iostream.h>#include<fstream.h>#include<stdlib.h>#include<string.h>#include<stdio.h>classPerson{public:charname[8];};classstudent:publicPerson//构建学生类{public: friendvoidManage(studentstud[]); friendvoidInput(studentstud[]); friendvoidStatistic(studentstud[]); friendvoidLookup(studentstud[]); friendvoidModify(studentstud[]); friendvoidOutput(studentstud[]); friendvoidInsert(studentstud[]); friendvoidWrite(studentstud[],intn);friendintRead(studentstud[]);private: intnum; charname[8]; charclass_0[20]; floatc_program; floatenglish; floatmath; floataverage; intorder;}stud[100];classManage:publicstudent{};voidWrite(studentstud[],intn)//向文件中写入数据{ fstreammyFile; myFile.open("score.txt",ios::out|ios::binary); if(!myFile) { cout<<"score.txtcan'topen!"<<endl; abort(); } intcount=n; myFile<<count<<endl<<endl; for(inti=0;i<=count;i++) {myFile<<stud[i].class_0<<""<<stud[i].num<<""<<stud[i].name<<""<<stud[i].c_program<<""<<stud[i].english<<""<<stud[i].math<<""<<stud[i].average<<endl; }myFile.close();}intRead(studentstud[])//从文件中读数据{fstreammyFile;myFile.open("score.txt",ios::in|ios::binary); if(!myFile) { cout<<"score.txtcan'topen!"<<endl; abort(); } intcount; myFile.seekg(0);myFile>>count; for(inti=0;i<=count;i++) {myFile>>stud[i].class_0>>stud[i].num>>stud[i].name>>stud[i].c_program>>stud[i].english>>stud[i].math>>stud[i].average; }myFile.close();returncount;}voidInput(studentstud[])//---------------输入学生成绩{ system("cls");/*运行前清屏*/ inti=0; intflag; charsign; cout<<endl<<">>>>>>>>请输入学生成绩<<<<<<<<\n"<<endl; while(sign!='n'&&sign!='N')/*判定*/ { cout<<"班级:";/*交互输入*/ cin>>stud[i].class_0;loop: cout<<"学号:"; cin>>stud[i].num; intc=0; while(c<i) { c++; if(stud[i].num==stud[i-c].num) { cout<<"你输入学号已经存在!请重新输入!"<<endl; gotoloop; } } cout<<"姓名:"; cin>>stud[i].name; do{ flag=0; cout<<"C++成绩:"; cin>>stud[i].c_program;if(stud[i].c_program>100||stud[i].c_program<1)cout<<"请输入1-100之间数字!\n";elseflag=1; }while(flag==0);do{ flag=0; cout<<"英语成绩:"; cin>>stud[i].english;if(stud[i].english>100||stud[i].english<1)cout<<"请输入1-100之间数字!\n";elseflag=1; }while(flag==0);do{ flag=0; cout<<"数学成绩:"; cin>>stud[i].math;if(stud[i].math>100||stud[i].math<1)cout<<"请输入1-100之间数字!\n";elseflag=1; }while(flag==0); stud[i].average=(stud[i].c_program+stud[i].english+stud[i].math)/3; cout<<"平均分："<<stud[i].average<<endl; cout<<"继续录入学生成绩?(y/n)"; cin>>sign;/*输入判定*/ i++; } Write(stud,i);}voidStatistic(studentstud[])//---------------统计学生数据{system("cls");/*运行前清屏*/intn=Read(stud); cout<<endl<<">>>>>>>>显示学生成绩<<<<<<<<\n"<<endl;cout<<"班级"<<"\t"<<"学号"<<"\t"<<"姓名"<<"\t"<<"平均分"<<endl;for(inti=0;i<n;i++)cout<<stud[i].class_0<<"\t"<<stud[i].num<<"\t"<<stud[i].name<<"\t"<<stud[i].average<<endl;system("pause");}voidLookup(studentstud[])//---------------查找学生成绩{intp;cout<<"请选择1.按学号查找2.按姓名查找"<<endl; cin>>p; if(p==1){ system("cls");/*运行前清屏*/intn=Read(stud); ints; inti=0; cout<<endl<<">>>>>>>>查找学生成绩<<<<<<<<\n"<<endl; cout<<"请输入查找学生学号:"<<endl; cin>>s; while((stud[i].num-s)!=0&&i<n)i++;/*查找判定*/ if(i==n) { cout<<"没有该学生信息！"<<endl;/*输入失败信息*/ } else { cout<<"---------------------------"<<endl; cout<<"班级:"<<stud[i].class_0<<endl;/*输出该学生信息*/ cout<<"学号:"<<stud[i].num<<endl; cout<<"姓名:"<<stud[i].name<<endl; cout<<"C++:"<<stud[i].c_program<<endl; cout<<"英语:"<<stud[i].english<<endl; cout<<"数学:"<<stud[i].math<<endl; cout<<"平均分:"<<stud[i].average<<endl; }} if(p==2) {system("cls");/*运行前清屏*/intm=Read(stud); chart; inti=0; cout<<endl<<">>>>>>>>查找学生成绩<<<<<<<<\n"<<endl; cout<<"请输入查找学生姓名:"<<endl; cin>>t; while(strcmp(stud[i].name-t,stud[i].name)==0&&i<m)i++;/*查找判定*/ { cout<<"---------------------------"<<endl; cout<<"班级:"<<stud[i].class_0<<endl;/*输出该学生信息*/ cout<<"学号:"<<stud[i].num<<endl; cout<<"姓名:"<<stud[i].name<<endl; cout<<"C++:"<<stud[i].c_program<<endl; cout<<"英语:"<<stud[i].english<<endl; cout<<"数学:"<<stud[i].math<<endl; cout<<"平均分:"<<stud[i].average<<endl; }}}voidModify(studentstud[])//---------------修改学生成绩{ system("cls");/*运行前清屏*/intn=Read(stud); ints,a;floatq; inti=0; cout<<endl<<">>>>>>>>修改学生成绩<<<<<<<<\n"<<endl; cout<<"输入修改成绩学生学号:"<<endl; cin>>s; while((stud[i].num-s)!=0&&i<n)i++;/*查找判定*/ if(i==n) { cout<<"没有该学生成绩!"<<endl;/*输入失败信息*/ } else { cout<<"----------该学生信息----------\n"<<endl;/*格式头*/ cout<<"班级"<<"\t"<<"学号"<<"\t"<<"姓名"<<"\t"<<"c++"<<"\t"<<"英语"<<"\t"<<"数学"<<"\t"<<"平均分"<<endl; cout<<"---------------------------------"<<endl; cout<<stud[i].class_0<<"\t"<<stud[i].num<<"\t"<<stud[i].name<<"\t"<<stud[i].c_program<<"\t"<<stud[i].english<<"\t"<<stud[i].math<<"\t"<<stud[i].average<<endl; cout<<"---------------------------------"<<endl; cout<<"请输入要修改课程号"<<endl; cout<<"1.c语言2.英语3.数学"<<endl; cin>>a; cout<<"重新输入分数"<<endl; cin>>q; if(a==1)stud[i].c_program=q; if(a==2)stud[i].english=q; if(a==3)stud[i].math=q; stud[i].average=(stud[i].c_program+stud[i].english+stud[i].math)/3;cout<<"----------该学生信息----------\n"<<endl;/*格式头*/ cout<<"班级"<<"\t"<<"学号"<<"\t"<<"姓名"<<"\t"<<"c++"<<"\t"<<"英语"<<"\t"<<"数学"<<"\t"<<"平均分"<<endl; cout<<"---------------------------------"<<endl; cout<<stud[i].class_0<<"\t"<<stud[i].num<<"\t"<<stud[i].name<<"\t"<<stud[i].c_program<<"\t"<<stud[i].english<<"\t"<<stud[i].math<<"\t"<<stud[i].average<<endl; charc; cout<<"是否保留数据?(y/n)"<<endl; cin>>c; if(c!='n'&&c!='N') Write(stud,n); }}voidInsert(studentstud[])//---------------增加学生成绩{ system("cls");/*运行前清屏*/ intn=Read(stud); chars; cout<<endl<<"************插入学生成绩***********\n"<<endl; while(s!='n'&&s!='N') { cout<<"班级:"<<endl;/*交互输入*/cin>>stud[n].class_0;cout<<"学号:";cin>>stud[n].num;cout<<"姓名:";cin>>stud[n].name; cout<<"C++成绩:"; cin>>stud[n].c_program; cout<<"英语成绩:"; cin>>stud[n].english; cout<<"数学成绩:"; cin>>stud[n].math; stud[n].average=(stud[n].c_program+stud[n].english+stud[n].math)/3; cout<<"平均分"<<stud[n].average; n++; cout<<"插入成功！"<<endl;/*返回成功信息*/ cout<<"是否继续输入(y/n)"<<endl; cin>>s; } Write(stud,n);}voidManage(studentstud[])//---------------按平均分对学生成绩统计项进行降序排序{ system("cls");/*运行前清屏*/ inti,j,k; floats; chart[20]; cout<<endl<<"**********排列管理成绩**********\n"<<endl; intn=Read(stud); for(i=0;i<n-1;i++)/*冒泡法排序*/ for(j=0;j<n-1-i;j++) if(stud[j].average<stud[j+1].average) { strcpy(t,stud[j+1].class_0); strcpy(stud[j+1].class_0,stud[j].class_0); strcpy(stud[j].class_0,t); k=stud[j+1].num; stud[j+1].num=stud[j].num; stud[j].num=k; strcpy(t,stud[j+1].name); strcpy(stud[j+1].name,stud[j].name); strcpy(stud[j].name,t); s=stud[j+1].c_program; stud[j+1].c_program=stud[j].c_program; stud[j].c_program=s; s=stud[j+1].english; stud[j+1].english=stud[j].english; stud[j].english=s; s=stud[j+1].math; stud[j+1].math=stud[j].math; s=stud[j+1].average; stud[j+1].average=stud[j].average; stud[j].average=s; } cout<<"-------------------------------------"<<endl;/*格式头*/ cout<<"班级"<<"\t"<<"学号"<<"\t"<<"姓名"<<"\t"<<"C++"<<"\t"<<"英语"<<"\t"<<"数学"<<"\t"<<"平均分"<<"\t"<<"名次"<<endl; for(i=0;i<n;i++)/*循环输入*/ { stud[i].order=i+1; cout<<stud[i].class_0<<"\t"<<stud[i].num<<"\t"<<stud[i].name<<"\t"<<stud[i].c_program<<"\t"<<stud[i].english<<"\t"<<stud[i].math<<"\t"<<stud[i].average<<"\t"<<stud[i].order<<endl; } Write(stud,n);}voidOutput(studentstud[])//---------------显示全部学生成绩{ system("cls");/*运行前清屏*/ intn=Read(stud); cout<<"*****************显示班级学生成绩*****************\n"<<endl; if(!stud) cout<<"没有统计"; else { cout<<"-------------------------------------------------------------------------"<<endl;/*格式头*/ cout<<"班级"<<"\t"<<"学号"<<"\t"<<"姓名"<<"\t"<<"c++"<<"\t"<<"英语"<<"\t"<<"数学"<<"\t"<<"平均分"<<endl; for(inti=0;i<n;i++)/*循环输入*/ { cout<<stud[i].class_0<<"\t"<<stud[i].num<<"\t"<<stud[i].name<<"\t"<<stud[i].c_program<<"\t"<<stud[i].english<<"\t"<<stud[i].math<<"\t"<<stud[i].average<<endl; }cout<<"-------------------------------------------------------------------------"<<endl; }}intmenu()/*菜单函数*/{ charc; do { system("cls");/*运行前清屏*/cout<<"*******************************************************\n"<<endl;cout<<"-----------------欢迎使用学生成绩管理系统-------------\n"<<endl;cout<<"$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$"<<endl;cout<<"*【1】输入学生成绩*"<<endl; cout<<"*【2】显示学生成绩*"<<endl; cout<<"*【3】查找学生成绩*"<<endl; cout<<"*【4】修改学生成绩*"<<endl; cout<<"*【5】插入学生成绩*"<<endl; cout<<"*【6】排列管理成绩*"<<endl;cout<<"*【7】显示班级学生成绩*"<<endl; cout<<"*【0】退出本系统*"<<endl; cout<<"$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$