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Answer to Question #43305 in C++ for Lisa

Question #43305
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.
Expert's answer
#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;
}

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