void update_staff(){
int x; // stores output when finds id matching index.
string id, name, newn; //newn = new name;
fstream fin; // fin = file in output mode.
cout << "Enter id of member: " << endl;
cin >> id;
fin.open("Member.csv", ios:: out); // here file is opened in output mode.
if(fin.is_open()){
getline(fin, name); //String from file to name is stored.
x = name.find(id);
if( x == -1){ // when no nothing found then -1 is stored in integer type variable.
cout << "Name not found! " << endl;
}
else
{
cout << "Name founded! " << endl;
cout << "Enter new name: ";
cin.ignore();
getline(cin, newn);
string.replace(newn, name);
}
}
fin.close();
fstream file;
file.open("Updated Member.csv", ios:: app);
if(file.is_open()){
file << newn;
} // end of above if statement
file.close();
} // ending of function.