CS 201 Introduction Programming Assignment No 3 Solution fall 2021/20-||VU||Virtual Universe
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CS 201 Assignment Soultion :
/* CS 201 Assignment 3 Soultion Fall 2021 ||VU||Virtuial Universe */ #include <iostream> #include <fstream> using namespace std; class Inventory { //Given Solution file CS 201 //100% Correct Soultion File private: int itemID; char itemName[20]; float itemPrice; float quanitity; float totalPrice; public: void readItems(); void displayItem(); int getItemID(); float getPrice(); float getQuanitiy(); int ret_ItemID(); void updateQuantity(float q); }; //Change Your Requirment void Inventory::readItems() { int price, quantity; cout <<"Please enter item ID: "; getItemID(); cout<<"Please enter item name: "; cin>>itemName; cout<<"Please enter item price: "; price=getPrice(); cout<<"Please enter item quanity: "; quantity=getQuanitiy(); totalPrice=price*quantity; } float Inventory::getPrice() { cin>>itemPrice; return itemPrice; } int Inventory::getItemID() { cin>>itemID; return itemID; } float Inventory::getQuanitiy() { cin>>quanitity; return quanitity; } int Inventory :: ret_ItemID() { return itemID; } void appendToFile() { Inventory obj; ofstream enter; enter.open("inventory.txt",ios::app); obj.readItems(); enter.write(reinterpret_cast<char *> (&obj), sizeof(Inventory)); enter.close(); cout<<"Inventry record added successfully "; } void displayAll() { Inventory st; ifstream inFile; inFile.open("inventory.txt"); if(!inFile) { cout<<"File could not be open !! press any key............."; cin.ignore(); cin.get(); return; } while(inFile.read(reinterpret_cast<char *> (&st), sizeof(Inventory))) { st.displayItem(); cout<<endl; } inFile.close(); cin.ignore(); cin.get(); } void Inventory::displayItem() { cout<<"ItemID:"<<itemID; cout<<"\tItem Name:"<<itemName; cout<<"\tItem Price:"<<itemPrice; cout<<"\tItemQuantity:"<<quanitity; cout<<"\tTotal Price:"<<totalPrice; } void increaseQuanity(int x) { bool found=false; Inventory std; float quantity; fstream file; file.open("inventory.txt"); if(!file) { cout<<"File could not be open !! Press any key............"; cin.ignore(); cin.get(); return; } while(!file.eof() && found==false) { file.read(reinterpret_cast<char *> (&std), sizeof(Inventory)); if(std.ret_ItemID()==x) { cout<<"Add Quantity: "; std.getQuanitiy(); int pos=(-1)*static_cast<int>(sizeof(std)); file.seekp(pos,ios::cur); file.write(reinterpret_cast<char *> (&std), sizeof(Inventory)); cout<<"Item Quantity updated successfully"<<endl; found=true; } } file.close(); if(found==false) cout<<"\n\n Record Not Found "; cin.ignore(); cin.get(); } int main() { int id; Inventory obj; char ch; do{ cout<<"ENTER CHOICE\n"; cout<<"01. ADD AN INVENTORY ITEM\n"; cout<<"02. DISPLAY FILE DATA\n"; cout<<"03. INCREASE QUANITY\n"; cout<<"Please enter your choice: "; cin>>ch; switch(ch) { case '1': appendToFile(); break; case '2': displayAll(); break; case '3': cout<<"Enter Item ID: "; cin>>id; increaseQuanity(id); break; case 'y': break; default : cout<<"Enter valid number"<<endl; } } while(ch != 'y'); return 0; } //Please Subscibe my channel