Project 1

#include 
#include 
#include 
#include 

// `M × N` matrix for storing data 
#define M 5
#define N 3
using namespace std;

int main()
{
    
    string* A = new string[M * N];  // dynamically allocate memory of size `M × N`
   
    // declarations 
    int Laptop[3], Mouse[3], Headset[3], Laptop_Bag[3], Adapter[3];
	int s;
	int vendor1_total, vendor2_total;
	int num[2][2];
	ofstream outdata;
	outdata.open("Project_1_sample.txt");
	
	// Menu
	start:
	cout<<"Select from below menun";
	cout<<"1. Select to Enter Commodities to be purchasedn"; 
    cout<<"2. Select to Enter Vendor quotationsn"; 
    cout<<"3. Select to find best vendor (Only select when you have enterd commodities and vendors data)n";
    cout<<"0. Exitn"; 
	cout<<endl;
	cin>>s;
	outdata << "Selected option" << endl;
	outdata << s << endl;

    // operations for selected choice from menu
	
	switch(s)
	{
	
	case 1:
		cout<<"nPlease enter the name of commoditiesn";
		cout<<endl;
		outdata << "nName of commodities" << endl;
		for (int i = 0; i < M; i++)
    {
        for (int j = 0; j < 1; j++) 
		{
           cin>> *(A + i*N + j);    	// assign values to the allocated memory for commodities only
           outdata << *(A + i*N + j) << endl;
		}
    }
    outdata<<endl;
	cout<<endl;
	goto start;
    break;
	
	case 2:
		cout<<"nPlease enter the Vendor 1 quotations (Strictly follow the sequence as per commodities entered): n";
		cout<<endl;
		outdata << "nVendor 1 quotations (Sequence: As per commodities entered)" << endl;
		for (int i = 0; i < M; i++)
    {
        for (int j = 1; j < 2; j++) 
		{
           cin>> *(A + i*N + j);        // assign values to the allocated memory for vendor 1 quotations
           outdata << *(A + i*N + j) << endl;
		}
    }
	    cout<<"nPlease enter the Vendor 2 quotations (Strictly follow the sequence as per commodities entered): n";
	    cout<<endl;
		outdata << "nVendor 2 quotations (Sequence: As per commodities entered)" << endl;
		for (int i = 0; i < M; i++)
    {
        for (int j = 2; j < 3; j++) 
		{
           cin>> *(A + i*N + j);        // assign values to the allocated memory for vendor 2 quotations
           outdata << *(A + i*N + j) << endl;
		}
    }
		outdata<<endl;
		cout<<endl;
		goto start;
		break;
	
	case 3:
		cout<<"nEnter the no. of laptops 'Ramu', 'Raju' and 'Shyam' want to be bought (Strictly follow sequence as Ramu, raju and Shyam):n";
	    cout<<endl;
		outdata << "nNo. of laptops 'Ramu', 'Raju' and 'Shyam' want to be bought (Sequence: Ramu, raju and Shyam):"<<endl;
		for(int i=0; i<3; i++)
	    {cin>>Laptop[i]; outdata << Laptop[i] << endl;}  // Taking input and at the same time writing input data into file. 
	    
	    cout<<"nEnter the no. of Mouse 'Ramu', 'Raju' and 'Shyam' want to be bought (Strictly follow sequence as Ramu, raju and Shyam):n";	
        cout<<endl;
		outdata << "nNo. of Mouse 'Ramu', 'Raju' and 'Shyam' want to be bought (Sequence: Ramu, raju and Shyam):"<<endl;
		for(int i=0; i<3; i++)
	    {cin>>Mouse[i]; outdata << Mouse[i] << endl;}
    

        cout<<"nEnter the no. of Headset 'Ramu', 'Raju' and 'Shyam' want to be bought (Strictly follow sequence as Ramu, raju and Shyam):n";	
	    cout<<endl;
		outdata << "nNo. of Headset 'Ramu', 'Raju' and 'Shyam' want to be bought (Sequence: Ramu, raju and Shyam):"<<endl;
		for(int i=0; i<3; i++)
	    {cin>>Headset[i]; outdata << Headset[i] << endl;}
	
	    cout<<"nEnter the no. of Laptop_Bag 'Ramu', 'Raju' and 'Shyam' want to be bought (Strictly follow sequence as Ramu, raju and Shyam):n";	
	    cout<<endl;
		outdata << "nNo. of Laptop_Bag 'Ramu', 'Raju' and 'Shyam' want to be bought (Sequence: Ramu, raju and Shyam):"<<endl;
		for(int i=0; i<3; i++)
	    {cin>>Laptop_Bag[i]; outdata << Laptop_Bag[i] << endl;}
    
    
        cout<<"nEnter the no. of Adapter 'Ramu', 'Raju' and 'Shyam' want to be bought (Strictly follow sequence as Ramu, raju and Shyam):n";	
	    cout<<endl;
		outdata << "nNo. of Adapter 'Ramu', 'Raju' and 'Shyam' want to be bought (Sequence: Ramu, raju and Shyam):"<<endl;
		for(int i=0; i<3; i++)
	    {cin>>Adapter[i]; outdata << Adapter[i] << endl;}
    
		
		
	    //conveting strings to integer. As we have created array of strings while taking commodity and vendor inputs
	    for (int i = 0; i < M; i++)
        {
        for (int j = 1; j < 3; j++) 
		{num[i][j] = stoi(*(A + i*N + j));}
        }
		
		
		for(int k=0; k<3; k++)
		{
			//0 indice correspond to ramu, 1 to Raju and 2 to Shyam.
			if (k==0) 
			{
             cout << "nThe best vendor for Ramu is : ";
            } 
            else if (k==1) 
			{
              cout << "nThe best vendor for Raju is : ";
            } 
            else 
			{
             cout << "nThe best vendor for Shyam is : ";
            }   
			
			vendor1_total= Laptop[k]*num[0][1] + Mouse[k]*num[1][1] + Headset[k]*num[2][1] + Laptop_Bag[k]*num[3][1] + Adapter[k]*num[4][1];
			vendor2_total= Laptop[k]*num[0][2] + Mouse[k]*num[1][2] + Headset[k]*num[2][2] + Laptop_Bag[k]*num[3][2] + Adapter[k]*num[4][2];
		
		    if(vendor1_total<vendor2_total)
			{
				cout<<" Vendor 1 "<<endl;
			}
			else
			{
				cout<<" Vendor 2 "<<endl;
			}
		
		}
		
		break;
	
	case 0:
		exit(0);
	   
	default:
	    cout<<"Invalid selection";	
	    goto start;
	
	}
	
    return 0;