Student Performance Management System

#include <iostream> #include <string> #include <fstream> #include <cstdlib>using namespace std; enum {subject=5};//altogether five-door typedef struct{char subject[10];//account name int score;//account score}markinfo;typedef struct studentnode{ Markinfo mark[subject];int Totalmark;char name[10];//student name Studentnode * NEXT;} Studentnode;class Student {Studentnode * head;public:student (); int addstudent (); ~student (); int countmark (); int Sortbymark (); int save (); int show (); int display (); int readfiletolist (); int searchbyname ();}; Student::student ()//is initialized with a constructor function.
{head=new studentnode;head->next=null;} 1. Enter the student's name, score and other data, and save in the linked list. int student::addstudent () {Studentnode * p;int I;char check;system ("CLS");cout<< "**********************" < <endl;cout<< "Please enter student information:" <<endl;do{p=new studentnode;cin.ignore ();cout<< "name:"; Gets (p->name );i=0;p->totalmark=0;do{cout<< "Subject:", gets (P->mark[i].subject);cout<< "Score (0--100):";d o{cin> >p->mark[i].score;} while (p->mark[i].score>100| | p->mark[i].score<0);p->totalmark=p->totalmark+p->mark[i].score;getchar ();} while (++i!=subject); if (head->next==null) {head->next=p;p->next=null;} else {p->next=head->next;head->next=p;} cout<< "continue to join? Y or N:"; Check=getchar ();} while (check!= ' n ' &&check!= ' n '); return 0;} 2. Calculate the total of each student. int Student::countmark () {Studentnode * p=head->next;if (p==null) {cout<< "No students, please enter again" <<endl;system (" Pause "); return 0;} else {cout<< "***************" <<endl;cout<< "Student score Summary:" <<endl;while (p) {cout<< "name:" <<p->name<< "total:" <<p->totalmark<<endl;p=p->next;}} System ("pause"); return 0;} 4. Output all student scores into a file. int Student::save () {char address[35];int i;studentnode * p=head->next;cout<< "Please enter a saved address" <<endl; Cin.ignore (); Gets (address); Ofstream Fout;fout.open (Address,ios::app|ios::out); while (p) {fout<< "*";fout<<p-> name<< "*"; I=0;while (I!=subject) {fout<<p->mark[i].subject<< "*"; Fout<<p->mark[i]. score;i++;} fout<< "*";p =p->next;} Fout.flush (); Fout.close ();cout<< "has been saved. Please refer to "; system" ("pause"); return 0;} Student::~student ()//destructor {Studentnode * p,* S;p=head->next;while (p) {S=p->next;delete p;p=s;} Delete Head;} 3. Sort records According to their total size int Student::sortbymark () {Studentnode *move1=head->next;studentnode *move2,*max,*pre1,*pre2,* Maxpre,*s=move1;if (head->next==null) {cout<< "no record, please join" <<endl;system ("pause"); return 0;} for (pre1=head,max=move1,maxpre=pre1;move1->next!=null;pre1=move1, maxpre=pre1,move1=move1->next,max=move1) {for (pre2=move1,move2=move1->next;move2!=null;pre2=move2,move2= Move2->next) if (Move2->totalmark>max->totalmark) {maxpre=pre2;max=move2;} if (Move1->next==max)//Exchange Max and move1.
{Pre1->next=max;move1->next=max->next;max->next=move1;move1=max;} Else{s=move1->next;move1->next=max->next;max->next=s;maxpre->next=move1;pre1->next=max;move1 =max;}} cout<< "has been sorted from large to small" <<endl;system ("pause"); return 0;} 5 output input Information int student::show () {Studentnode * p=head->next;int i;if (head->next==null) {cout<< "No student record, please join" <<endl;system ("pause"); return 0;} else {while (p) {cout<< "name:" <<p->name;i=1;while (i!=subject+1) {cout<< "account:" <<p->mark[ i-1].subject;cout<< "score:" <<p->mark[i-1].score;i++;} Cout<<endl;p=p->next;}} System ("pause"); return 0;} 6: Read record from file int student::d isplay () {ifstream Fin;char buf[100];char str[25];cout<< "Please enter path and file name:" <<endl; Cin.ignore (), gets (str), Fin.open (str), if (!fin) {cout<< "Without this file" <<endl;system ("pause"); return 0;} while (Fin) {fin.getline (buf,sizeof (BUF)); Cout<<buf<<endl;} System ("pause"); return 0;} 8 Read the data from the file and save the data in the linked list int Student::readfilEtolist () {ifstream fin;int i;char str[25];cout<< "Please enter the path and file name:" <<endl;cin.ignore (); gets (str); Fin.open ( STR); if (!fin) {cout<< "does not have this file" <<endl;system ("pause"); return 0;} Studentnode * P;fin.ignore (+, ' * '), while (Fin) {p=new studentnode;p->totalmark=0;fin.getline (p->name,100, ' * ') ); I=0;while (i!=subject) {fin.getline (p->mark[i].subject,100, ' * ');fin>>p->mark[i].score;p-> totalmark+=p->mark[i].score;i++;} if (head->next==null) {head->next=p;p->next=null;} Else{p=head->next;head->next=p;}} cout<< "Information has been saved in the list" <<endl;system ("pause"); return 0;} 9 Find by name int Student::searchbyname () {if (head->next==null) {cout<< "No students, please join or read from the file" <<endl; System ("pause"); return 0;} Studentnode * P=head->next;char findname[10];int i;cout<< "Please enter your name:"; Cin.ignore (); gets (FindName); while (p) {if (!STRCMP (P->name,findname)) {cout<< "is searched. Find the student information such as the following: "<<endl<<endl;cout<<" Name: "<<p->name;i=1;while (i!=subject+1) {cout<<"Subject: "<<p->mark[i-1].subject;cout<<" score: "<<p->mark[i-1].score;i++;} Cout<<endl;system ("pause"); return 1;} P=p->next;} cout<< "Without this student, please join or read from the file" <<endl;system ("pause"); return 0;} int ShowMenu () {int Choice;char * menu[9]={"1: Enter student scores to save to list \ n", "2: Calculate each student's total score \ n", "3: Sort records According to total score", "4: Output all student scores into a file \ n "," 5: Display the newly entered student information \ n "," 6: Read the information from the file \ n "," 7: Save the file information in the list \ n "," 8: Find student record by name \ n "," 9: End program \ n "};cout<<" << "* * * * * * "<<endl;cout<<" * "<<" "<<" Student Performance management System "< < "*" <<endl;cout<< "" << "*****************************************************" <<endl; for (choice=0;choice<9;choice++) cout<< "" <<menu[choice];cout<< "<<" ****************** "<<endl;cout<<" choose to continue "<<endl;do{cin> >choice;} while (choice>9| | CHOICE&LT;1); return choice;} int main () {int menuitem,flag=1;student stu;while (flag) {sYstem ("CLS"); Menuitem=showmenu (); switch (MenuItem) {case 1:{stu.addstudent (); Case 2:{stu.countmark (); Case 3:{stu.sortbymark (); Case 4:{stu.save (); Case 5:{stu.show (); Case 6:{stu.display (); Case 7:{stu.readfiletolist (); Case 8:{stu.searchbyname (); Case 9:{flag=0;break;}}} return 0;

Student Performance Management System