Answer to Question #43305 in C++ for Lisa

Question

Write a C++ program that stores in a file the following information for students: name, address, phone number, age, and major field. Your program should use structures to represent a student’s record. In addition, your program should allow you to add, delete, search, and modify records.

Answer 1

#include <iostream>
#include <string>
#include <vector>
#include <fstream>
#include <cstdlib>
using namespace std;
struct Student
{
   string name;
   char adress[100];
   unsigned int phone_number;
   unsigned int age;
};
void init (vector<Student>& add)
{
   system("cls");
   Student st;
   cout<<"Input name - ";
   cin>>st.name;
   cout<<"Input phone number - ";
   cin>>st.phone_number;
   cout<<"Input age - ";
   cin>>st.age;
   cout<<"Input adress - ";
   cin.ignore();
   cin.getline(st.adress,100);
   system("cls");
   add.push_back(st);
}
int  find_st(const vector<Student>& add)
{
   system("cls");   
   string choise; 
   cout<<"Please enter name student - ";
   cin>>choise;
   for (size_t i = 0; i<add.size();i++)
   {
      if (add[i].name==choise) 
      {
         return i;
      }
   }
   cout<<"Search is unsuccessful "<<endl;
   system("pause");
   return -1;
}
void Del(vector<Student>& add,int choise)
{
   system("cls");   
   add.erase(add.begin() + choise);
   cout<<"Delete successful!"<<endl;
   system("pause");
   system("cls");   
}
void modify(vector<Student>& add ,int choise)
{
   system("cls");   
   cout<<"Name - "<<add[choise].name<<" Modify - name - ";
   cin>>add[choise].name;
   cout<<"Adress - "<<add[choise].adress<<" Modify - adress - ";
   cin.ignore();
   cin.getline(add[choise].adress,100);
   cout<<"Phone number - "<<add[choise].phone_number<<" Modify - phone number - ";
   cin>>add[choise].phone_number;
   cout<<"Age - "<<add[choise].age<<" Modify - age - ";
   cin>>add[choise].age;
   cout<<"Modify successful"<<endl;
   system("pause");
   system("cls");   
}
void menu ()
{
   system("cls");
   cout<<"Press 1 to add student"<<endl;
   cout<<"Press 2 to find and work with student"<<endl;
   cout<<"Press 0 to exit"<<endl;
}
void menu (int x)
{
   system("cls");
   cout<<"Search is successful "<<endl;
   cout<<"Press 1 to modify student"<<endl;
   cout<<"Press 2 to delete student"<<endl;
   cout<<"Press 0 to exit"<<endl;
}
void work_with_St(vector<Student>& add)
{
   int search_ind;
   char qv;
   do 
   {
      search_ind=find_st(add);
      if (search_ind==-1) return;
      menu(1);
      cin>>qv;   
      switch (qv)
      {
         case '1':modify(add,search_ind);qv='0';break;
         case '2':Del(add,search_ind);qv='0';break;
         case '0':break;
         default:cout<<"Wrong answer !Retry"<<endl;
      }
   }while (qv!='0');
   
}
int main(int argc, char** argv) 
{
   vector<Student> Stud;
   int search_Indx=0;
   char qv = '\0';
   do 
   {
      menu();
      cin>>qv;
      switch (qv)
      {
         case '1'  : init(Stud);break;
         case '2'  : work_with_St(Stud);break;
         case '0'  : break;
         default:cout<<"Wrong answer !Retry"<<endl;
      }
      system("cls");
   }while (qv!='0');
   return 0;
}