How Can I Acces The File And Edit It In Console Or How To Seach For Specific Name On The Database

#include <iostream>
#include <string>
#include<iomanip>
#include<fstream>
#include<conio.h>
#include <sstream>
#include<windows.h>
#include<time.h>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <conio.h>
#include <iomanip>


using namespace std;
fstream fp;
struct informationinfo{
	
	string fname;
	string mname;
	string lname;
	string sex;
	string occupation;
	string birthday;
	string address;
	long double salary;
	unsigned long long int cpnumber;
	int age;
	int memberid;
	int familymembers;
		
}person;

struct inventoryinfo{
	string itemn;
	string itemcode;
	int quantity;
	long double price;
}item;

struct donatetorinfo{
	
	string fullname;
	string address;
	unsigned long long int number;
	int amount_of_donation;
	
}donate;
struct plans{
	string event;
	string date;
	string address;
	string description;
}day;
//globals
//functions
void menulist();
void information();
void inventory();
void donation();
void planner();



//inside information functions
void add_();;
void display_();
void edit_();
void search_();
void displaymember();
//inside inventory function
void inventoryadd();
void displayinvent();
//Donation functions
void donateinfo();
void displaydonate();
//planner
void addplans();
void viewplans();

int main()
{
	/*
	string user;
	string pass;
	system("cls");
	system("title DAP");
	system("color 0f");
	
	int i;

        cout<<"\n\n\n\n\n\n\n\n\n\n\t\t\t\t LOADING...";
        cout<<"\n\n\n\t\t";
        cout<<" ";
        for (i = 0; i < 45; i += 1)
        {
        	int time = 100;
            Sleep(time);
            system("color 09");
            cout<<"¦";

        }
        
	do
	{
	system("cls");
	cout<<"\n\n\n\t\t\t\tUsername: ";
	cin>>user;
	cout<<"\t\t\t\tPassword: ";
	cin>>pass;
	}while(user != "admin" || pass != "1234");

if(user == "admin" && pass == "1234")
{
*/
	menulist();
//}

	getch();
	return 0;
}
void menulist()
{
	char choice;
	long int recsize;
	
	system("cls");
	system("title GOVERNMENT ASSISTANT PROGRAM");
	system("color 0f");
	
	cout<<"[1]Information"<<endl;
	cout<<"[2]Inventory"<<endl;
	cout<<"[3]Donation"<<endl;
	cout<<"[4]Planner"<<endl;
	cout<<"[5]Exit"<<endl;
	
	fflush(stdin);
    choice = _getche();
    
    system("cls");
    recsize = sizeof(choice);
    
	switch(choice)
	{
		case '1':
			information();
			break;
		case '2':
			inventory();
			break;
		case '3':
			donation();
			break;
		case '4':
			planner();
			break;
		case '5':
			exit(1);
			break;
	}
}

//menu list
void information()
{

char choice, another;
long int recsize;
	while(1)
	{
	
	system("cls");
	system("title MEMBER INFORMATION");
	system("color 0f");
	cout<<"[1]Add members"<<endl;
	cout<<"[2]Search for members"<<endl;
	cout<<"[3]Edit an existing member information"<<endl;
	cout<<"[4]Display all members"<<endl;
	cout<<"[5]Back to main menu"<<endl;
	
	fflush(stdin);
    choice = _getche();
    
    system("cls");
    recsize = sizeof(choice);
	switch(choice)
	{
		case '1':
			add_();
			break;
		case '2':
			search_();
			break;
		case '3':
			edit_();
			break;
		case '4':
			display_();
			break;
		case '5':
			system("cls");
			menulist();
			break;
	}
}
}

//information menu
void add_()
{
	system("cls");
	system("title ADD");
	system("color 0f");
	
    
	ofstream newmember;
	newmember.open("Member information.dat",ios::app|ios::out);
	cout<<"First name(if 2 words sperate it with ,): ";
	cin>>person.fname;
	cout<<"Middle name name: ";
	cin>>person.mname;
	cout<<"Last name: ";
	cin>>person.lname;
	cout<<"Age: ";
	cin>>person.age;
	cout<<"Sex: ";
	cin>>person.sex;
	cout<<"Birtday: ";
	cin>>person.birthday;
	cout<<"Adrress: ";
	cin>>person.address;
	cout<<"Occupation: ";
	cin>>person.occupation;
	cout<<"Salary: ";
	cin>>person.salary;
	cout<<"# Family Members: ";
	cin>>person.familymembers;
	cout<<"Cellphone Numer: ";
	cin>>person.cpnumber;
	
	newmember<<"\nName: "<<person.fname<<" "<<person.mname<<" "<<person.lname
	<<"\n"<<"Age: "<<person.age<<"\n"<<"Sex: "<<person.sex<<"\n"<<"Birthday: "
	<<person.birthday<<"\n"<<"Address: "<<person.address<<"\n"<<"Occupation: "
	<<person.occupation<<"\n"<<"Salary: Php"<<person.salary<<"\n"<<"Numer of family: "
	<<person.familymembers<<"\n"<<"Cellphone #: "<<person.cpnumber<<"\n___________________";
	
	newmember.close();
	cin.get();
	system("cls");
	information();
}
void display_()
{
	system("title Display All");
	system("color 0f");
	system("cls");
	
	ifstream ifs;
	ifs.open ("Member information.dat");
	char c = ifs.get();
	while (ifs.good()) {
    std::cout << c;
    c = ifs.get();
	}
	ifs.close();
	getch();
	system("cls");
	information();
}
void edit_()
{
	string str_search;
	ostringstream text;
	ifstream in_file("Member information.day");
	
	text<< in_file.rdbuf();
	string str = text.str();
	string str_found = "Mark";
	string str_replace = "Ulaga";
	size_t pos = str.find(str_search);
	str.replace(pos,string(str_search).length(),str_replace);
	in_file.close();
	
	ofstream out_file("Member information.dat");
	out_file<<str;
	getch();
	
}
void search_(){
	int str;
	
	ifstream newmember("Member information.dat");
	
	cout<<"Enter name: ";
	cin>>str;

	
}
void displaymember()
{
	system("cls");
	system("title Results");
	system("color 0f");
	
	cout<<"\nName: "<<person.fname<<" "<<person.mname<<" "<<person.lname
	<<"\n"<<"Age: "<<person.age<<"\n"<<"Sex: "<<person.sex<<"\n"<<"Birthday: "
	<<person.birthday<<"\n"<<"Address: "<<person.address<<"\n"<<"Occupation: "
	<<person.occupation<<"\n"<<"Salary: Php"<<person.salary<<"\n"<<"Numer of family: "
	<<person.familymembers<<"\n"<<"Cellphone #: "<<person.cpnumber;
	
	getch();
}

//------------------------------------------------------------------------------------


void inventory()
{
	char choice;
	long int recsize;
	system("cls");
	system("title INVENTORY");
	system("color 0f");
	cout<<"[1]Add item"<<endl;
	cout<<"[2]Search item"<<endl;
	cout<<"[3]Edit item and delete item"<<endl;
	cout<<"[4]Display all item"<<endl;
	cout<<"[5]Back to main menu";
	
	fflush(stdin);
    choice = _getche();
    
    system("cls");
    recsize = sizeof(choice);
	switch(choice)
	{
		case '1':
			inventoryadd();
			break;
		case '2':
			break;
		case '3':
			break;
		case '4':
			displayinvent();
			break;
		case '5':
			system("cls");
			menulist();
			break;
	}	
}


//inventory menu
void inventoryadd()
{
	system("cls");
	system("title Add item");
	system("color 0f");
	
	cout<<"\nEnter item name: ";
	cin>>item.itemn;
	cout<<"Enter item code: ";
	cin>>item.itemcode;
	cout<<"\nEnter item quantit: ";
	cin>>item.quantity;
	cout<<"\nEnter estimated amount of the item: "<<endl;
	cin>>item.price;
	
	ofstream inventoryitem("Inventory.dat",ios::app);
	
	inventoryitem<<"Item code: "<<item.itemcode<<"\nItem name: "<<item.itemn<<"\n"
	<<"Item quantity: "<<item.quantity<<"\n"<<"Item estimated amount: "<<item.price;
	inventoryitem.close();
	
}
void displayinvent()
{
	system("title Display all Item");
	system("color 0f");
	system("cls");
	ifstream ifs;
	ifs.open ("inventory.dat");
	char c = ifs.get();
	while (ifs.good()){
    std::cout << c;
    c = ifs.get();
  }
  ifs.close();
  getch();
  inventory();
}






//-----------------------------------------------------------------------------------




void planner()
{
	char choice;
	long int recsize;
	system("cls");
	system("title PLANNER");
	system("color 0f");
	
	cout<<"[1]Add plans"<<endl;
	cout<<"[2]Edit plans"<<endl;
	cout<<"[3]search plans"<<endl;
	cout<<"[4]View all plans"<<endl;
	cout<<"[5]View calendar"<<endl;
	cout<<"[6]Back to main menu";
	fflush(stdin);
    choice = _getche();
    
    system("cls");
    recsize = sizeof(choice);
	switch(choice)
	{
		case '1':
			addplans();
			break;
		case '2':
			
			break;
		case '3':
			break;
		case '4':
			viewplans();
			break;
		case '5':
			break;
		case '6':
			system("cls");
			menulist();
			break;
	}
}
void addplans(){
	
	system("cls");
	system("title");
	system("color 0f");
	
	ofstream event("plans.dat",ios::app);
	
	cout<<"Enter events name: ";
	cin>>day.event;
	cout<<"Date of the event: ";
	cin>>day.date;
	cout<<"Address";
	cin>>day.address;
	cout<<"Event description";
	getline(cin,day.description);
	
	event<<"Event name: "<<day.event<<"\n"<<"Event date: "<<day.date
	<<"\n"<<"Address of the event: "<<day.address<<"\n"<<"Plan description: \n"
	<<day.description<<"\n---------------------------";
	event.close();
	cin.get();
	system("cls");
	planner();
	
}
void viewplans(){
	system("title Display");
	system("color 0f");
	system("cls");
	
	ifstream ifs;
	ifs.open ("plans.dat");
	char c = ifs.get();
	while (ifs.good()){
    cout<<c;
    c = ifs.get();
  }
  ifs.close();
  
  getch();
  planner();
}

//-----------------------------------------------------------------------------------


void donation()
{
	char choice;
	long int recsize;
	system("cls");
	system("title DONATION");
	system("color 0f");
	
	cout<<"[1]Information of donatetor"<<endl;
	cout<<"[2]Edit donations"<<endl;
	cout<<"[3]Search donation"<<endl;
	cout<<"[4]View all donation"<<endl;
	cout<<"[5]Back to main menu"<<endl;
	
	fflush(stdin);
    choice = _getche();
    
    system("cls");
    recsize = sizeof(choice);
	
	switch(choice)
	{
		case '1':
			donateinfo();
			break;
		case '2':
			break;
		case '3':
			break;
		case '4':
			displaydonate();
			break;
		case '5':
			system("cls");
			menulist();
			break;
	}
}

//Donation menu

void donateinfo()
{
	ofstream donatetorinfo("Donatetorinfo.dat",ios::app);
	
	cout<<"Full Name exp(F/M/L,seperated with ","): ";
	cin>>donate.fullname;
	cout<<"Address exp(San,Gregorio,Malvar,Batangas): ";
	cin>>donate.address;
	cout<<"Amount of donation: ";
	cin>>donate.amount_of_donation;
	cout<<"Cellphone number: ";
	cin>>donate.number;
	
	donatetorinfo<<"\nName: "<<donate.fullname<<"\n"<<"Address: "<<donate.address
	<<"Amount of Donation: "<<donate.amount_of_donation<<"\nCell no: "<<donate.number;
	donatetorinfo.close();
	system("cls");
	cin.get();
	donation();
	
}
void displaydonate()
{
	system("title Display");
	system("color 0f");
	system("cls");
	
	ifstream ifs;
	ifs.open ("Donatetorinfo.dat");
	char c = ifs.get();
	while (ifs.good()){
    cout<<c;
    c = ifs.get();
  }
  ifs.close();
  
  getch();
  donation();
}</iomanip></conio.h></cstdlib></cstring></cstdio></time.h></windows.h></sstream></conio.h></fstream></iomanip></string></iostream>