Question

C++ program on visual studio.

Name your program dynamic arrays cpp 6. Here are 4 files: uuunheksust aumhers2 and waubera3izst aad uumbers.4 st. The first two coutains a "header" line telling you how many data items follow The first one is very sma l, so you can easily verify you are getting the right results: the second is larger, too large to verify by hand The second pair are like the first two, except they are inst a list of numbers (no "header", e., no count at the top a. Write a program that can calculate the average, min and max of the numbers in the first 2 files. It should rcad the first value of points), allocate an array the corroet size, rcad the data into that array, then analyze the array and print the count, average min & max of the array a. Use a function to read the data. a second function to find the average. and a third function to find the min & max. ead the count and allocate the array itselfin the read data routine your read datar...) routine will have to pass back both the count and the pointer after it allocates the array b, I r omurend that you print out the Iirst few elements aud the last few elem ul be data ile EL you read them in to Luake sure you get all the values. Soule p slal s ill the various routiues ould also riul be helpful while writing ing to make sure things are working properly. c. Make sure you delete the dynamic array properly and set your pointer back to NULL b. Modify your program to work with an array of filenames, and read and print the statistics for each file in the list. You can use an array of strings for the filename mbers l txt", "n11m .txt mbers e. Wrile a modified version of the program ir part a. ulat van work with the files numbers3.ixu and LuLubers4.xl he uuly differerke is bat the file doesn'l lell u the size upfront. Your prograILL will have lo read uhe file twice once to count how many values there are, and then (after allocating an array read in the data and get the min, nmax and averag a. Use a function count valuestfilename) that reads the file and counts the number of values b. Note: if you're not care l, you can end up reading and counting the last elemeat twice! Make sure you don't do that...remember, cou is your friend here. You ca ot strings tor the array Name your programs read nums.cpp (part by and read nums nh.cpp (part c)

File number 1

File number 2

100
0.6586 0.3846 0.4242 0.0112 0.8436 0.5168 0.1788 0.8928 
0.1873 0.1028 0.3814 0.2861 0.4140 0.8359 0.4081 0.0883 
0.2221 0.1202 0.6439 0.9184 0.7060 0.0387 0.0478 0.4748 
0.5952 0.0356 0.0935 0.3628 0.1593 0.1353 0.6460 0.9259 
0.7315 0.0014 0.8023 0.4504 0.1959 0.4978 0.8705 0.0927 
0.2421 0.2144 0.9471 0.7074 0.4388 0.9107 0.8313 0.3972 
0.3291 0.9885 0.4689 0.7887 0.6331 0.9285 0.0664 0.2858 
0.8726 0.6144 0.7742 0.4244 0.1807 0.3594 0.7822 0.0160 
0.3048 0.1838 0.9963 0.6201 0.3480 0.6696 0.5898 0.0534 
0.2794 0.0626 0.7458 0.9797 0.6402 0.2789 0.7918 0.4829 
0.8573 0.3744 0.8515 0.6129 0.7993 0.1410 0.6169 0.4777 
0.2654 0.3925 0.1797 0.9534 0.3515 0.1373 0.2590 0.5262 
0.8967 0.5786 0.5796 0.9753 

File 3

0.6587 0.0946 0.2470 0.9736 0.7696 0.3633 0.7904 0.7180 
0.0182 0.2538

File 4

0.6588 0.3307 0.0923 0.7707 0.8266 0.0856 0.5901 0.2587 
0.5662 0.1436 0.8865 0.8686 0.3430 0.8731 0.0120 0.9793 
0.3566 0.3511 0.1464 0.9237 0.2305 0.6419 0.7171 0.3879 
0.9802 0.8434 0.8524 0.9803 0.6393 0.1710 0.9556 0.7918 
0.6051 0.4253 0.8847 0.2974 0.1751 0.1901 0.6016 0.0529 
0.6532 0.6909 0.6270 0.3081 0.9844 0.0913 0.7804 0.9384 
0.5104 0.0808 0.4637 0.1207 0.7664 0.1757 0.8443 0.2810 
0.4681 0.5441 0.0504 0.2413 0.3203 0.4950 0.2709 0.5870 
0.9040 0.0031 0.9806 0.3421 0.7810 0.8820 0.6110 0.5777 
0.5918 0.4771 0.6382 0.9131 0.8696 0.7814 0.6373 0.5891 
0.6919 0.1354 0.3276 0.2666 0.8467 0.0274 0.7036 0.2401 
0.2492 0.0497 0.1755 0.1430 0.8819 0.5356 0.9924 0.9056 
0.2592 0.8239 0.6592 0.4372 0.3992 0.7785 0.9229 0.4604 
0.7436 0.4442 0.3306 0.7299 0.5410 0.2965 0.8120 0.9367 
0.6246 0.9924 0.6948 0.2888 0.5946 0.9179 0.3516 0.7335 
0.6317 0.7017 0.6118 0.7904 0.8157 0.8506 0.6783 0.3412 
0.3074 0.3373 0.5280 0.2740 0.6918 0.2992 0.3041 0.3716 
0.8320 0.0446 0.2283 0.8051 0.6274 0.3045 0.8478 0.2471 
0.3591 0.8741 0.1698 0.8507 0.9717 0.5391 0.1541 0.7754 
0.7072 0.9070 0.3792 0.8400 0.1867 0.5889 0.1523 0.8331 
0.2234 0.2612 0.8041 0.6179 0.3373 0.4647 0.3963 0.3560 
0.7369 0.2827 0.4297 0.3351 0.3868 0.0790 0.0090 0.8626 
0.2649 0.0000 0.6278 0.9614 0.6589 0.9136 0.5878 0.9059 
0.9191 0.5276 0.1577 0.0641 0.5367 0.5814 0.0401 0.3747 
0.6924 0.5495 0.6036 0.5485 0.6035 0.0843 0.7249 0.9070 
0.7063 0.6156 0.5080 0.2265 0.4235 0.3792 0.4684 0.5095 
0.9370 0.5267 0.9792 0.6033 0.4888 0.9496 0.2659 0.2492 
0.0191 0.4682 0.4594 0.1840 0.8174 0.2051 0.8201 0.8615 
0.7371 0.2059 0.7935 0.9230 0.2111 0.6422 0.2651 0.0267 
0.2366 0.2076 0.4245 0.9873 0.6739 0.4704 0.2711 0.8266 
0.9413 0.8225 0.4302 0.8097 0.1124 0.5928 0.6481 0.1508 
0.7231 0.8831 0.5020 0.4352 0.3359 0.8441 0.4119 0.7372 
0.6741 0.8087 0.5038 0.8104 0.9070 0.8843 0.7849 0.9730 
0.9305 0.5505 0.5111 0.2630 0.8931 0.1373 0.4432 0.8164 
0.1316 0.6408 0.1194 0.9835 0.6316 0.9561 0.5249 0.3313 
0.1764 0.4484 0.4166 0.1489 0.9874 0.5722 0.5663 0.0751 
0.0402 0.0365 0.7163 0.9608 0.4102 0.4177 0.5507 0.9265 
0.0336 0.8749 0.2448 0.4612 0.6280 0.6056 0.0160 0.7277 
0.1214 0.6448 0.4698 0.0216 0.3909 0.1478 0.8785 0.5933 
0.0555 0.3265 

Answer 1

(a)

C++ Program:

// Program that finds Average, Min and Max of array
#include "stdafx.h"
#include<iostream>
#include<string>
#include<fstream>

using namespace std;

//Function that reads data into array from file
double* read_data(int &len)
{
   string fileName;
   int i;
   double *arr;

   //Reading file name
   cout << "\n Enter file Name: ";
   getline(cin, fileName);

   //OPening file in read mode
   fstream fin(fileName, ios::in);

   //If file was failed to open
   if(fin.fail())
   {
       cout << "\n Error Opening file... ";
       return NULL;
   }

   //Reading length
   fin >> len;

   //Allocating memory
   arr = new double[len];

   //Reading values from file
   for(i=0; i<len; i++)
   {
       fin >> arr[i];
   }

   //Returning length of array
   return arr;
}

//Function that calculates average
void calc_average(double *arr, int n)
{
   double sum=0;
   int i;
   double average;

   //Iterating over array
   for(i=0; i<n; i++)
   {
       sum = sum + arr[i];
   }

   //Calculating average
   average = sum / (double)n;

   //Printing average
   cout << "\n\n Average of values: " << average << " \n";
}

//Function that finds min and max values
void calc_min_max(double *arr, int n)
{
   double min, max;
   int i;

   //Initially assume that first element is min and max
   min = arr[0];
   max = arr[0];

   //Iterating over array
   for(i=0; i<n; i++)
   {
       //Comparing min element
       if(arr[i] < min)
       {
           //Updating min element
           min = arr[i];
       }

       //Comparing max element
       if(arr[i] > max)
       {
           //Updating max element
           max = arr[i];
       }
   }

   //Printing average
   cout << "\n\n Minimum Element: " << min << " \n";
   cout << "\n Maximum Element: " << max << " \n";
}

//Main function
int _tmain(int argc, _TCHAR* argv[])
{
   double *arr = NULL;
   int length;

   //Reading data from file
   arr = read_data(length);

   //Finding average
   calc_average(arr, length);

   //Finding min and max
   calc_min_max(arr, length);

   getchar();

   return 0;
}

Sample Output:

c:luserslsaibabuidocumentslvisual studio 20101Project Enter file Name: number1.txt Average of values 0.59872 Mininum Element: Maxinun Elenent: 8.9289 8.1227

_______________________________________________________________________________________________

(b)

// Program that reads data from array of files and prints average, min and max

#include "stdafx.h"
#include<iostream>
#include<string>
#include<fstream>

using namespace std;

//Function that reads data into array from file
double* read_data(string fileName, int &len)
{
   int i;
   double *arr;

   //OPening file in read mode
   fstream fin(fileName, ios::in);

   //If file was failed to open
   if(fin.fail())
   {
       cout << "\n Error Opening file... ";
       return NULL;
   }

   //Reading length
   fin >> len;

   //Allocating memory
   arr = new double[len];

   //Reading values from file
   for(i=0; i<len; i++)
   {
       fin >> arr[i];
   }

   //Returning length of array
   return arr;
}

//Function that calculates average
void calc_average(double *arr, int n)
{
   double sum=0;
   int i;
   double average;

   //Iterating over array
   for(i=0; i<n; i++)
   {
       sum = sum + arr[i];
   }

   //Calculating average
   average = sum / (double)n;

   //Printing average
   cout << "\n\n Average of values: " << average << " \n";
}

//Function that finds min and max values
void calc_min_max(double *arr, int n)
{
   double min, max;
   int i;

   //Initially assume that first element is min and max
   min = arr[0];
   max = arr[0];

   //Iterating over array
   for(i=0; i<n; i++)
   {
       //Comparing min element
       if(arr[i] < min)
       {
           //Updating min element
           min = arr[i];
       }

       //Comparing max element
       if(arr[i] > max)
       {
           //Updating max element
           max = arr[i];
       }
   }

   //Printing average
   cout << "\n\n Minimum Element: " << min << " \n";
   cout << "\n Maximum Element: " << max << " \n";
}

//Main function
int _tmain(int argc, _TCHAR* argv[])
{
   double *arr = NULL;
   int length, i;

   //Array of file names
   string fileNames[] = {"number1.txt", "number2.txt"};

   for(i=0; i<2; i++)
   {
       cout << "\n\n File Name: " << fileNames[i] << " \n";

       //Reading data from file
       arr = read_data(fileNames[i], length);

       //Finding average
       calc_average(arr, length);

       //Finding min and max
       calc_min_max(arr, length);
   }
  
   getchar();

   return 0;
}

Sample Output:

cusers saibabu documents visual studio File Name: number1.txt Average of values: 0.59872 Mininum Element: Maxinum Element: 8.1227 8.9289 File Name number2.txt Average of values:0.484377 Minimum Element 0.0014 Maxinun Element 8.9963

____________________________________________________________________________________________

(c)

// Program that reads data from array of files and prints average, min and max

#include "stdafx.h"
#include<iostream>
#include<string>
#include<fstream>

using namespace std;

//Function that counts number of values
int count_values(string fileName)
{
   int len=0;
   double val;

   //OPening file in read mode
   fstream fin(fileName, ios::in);

   //If file was failed to open
   if(fin.fail())
   {
       cout << "\n Error Opening file... ";
       return 0;
   }

   //Counting values in file
   while(fin.good())
   {
       fin >> val;

       //Accumulating length
       len = len + 1;
   }

   //Closing file
   fin.close();

   return len;
}

//Function that reads data into array from file
double* read_data(string fileName, int len)
{
   int i;
   double *arr;

   //OPening file in read mode
   fstream fin(fileName, ios::in);

   //If file was failed to open
   if(fin.fail())
   {
       cout << "\n Error Opening file... ";
       return NULL;
   }

   //Allocating memory
   arr = new double[len];

   //Reading values from file
   for(i=0; i<len; i++)
   {
       fin >> arr[i];
   }

   fin.close();

   //Returning length of array
   return arr;
}

//Function that calculates average
void calc_average(double *arr, int n)
{
   double sum=0;
   int i;
   double average;

   //Iterating over array
   for(i=0; i<n; i++)
   {
       sum = sum + arr[i];
   }

   //Calculating average
   average = sum / (double)n;

   //Printing average
   cout << "\n\n Average of values: " << average << " \n";
}

//Function that finds min and max values
void calc_min_max(double *arr, int n)
{
   double min, max;
   int i;

   //Initially assume that first element is min and max
   min = arr[0];
   max = arr[0];

   //Iterating over array
   for(i=0; i<n; i++)
   {
       //Comparing min element
       if(arr[i] < min)
       {
           //Updating min element
           min = arr[i];
       }

       //Comparing max element
       if(arr[i] > max)
       {
           //Updating max element
           max = arr[i];
       }
   }

   //Printing average
   cout << "\n\n Minimum Element: " << min << " \n";
   cout << "\n Maximum Element: " << max << " \n";
}

//Main function
int _tmain(int argc, _TCHAR* argv[])
{
   double *arr = NULL;
   int length, i;

   //Array of file names
   string fileNames[] = {"number3.txt", "number4.txt"};

   for(i=0; i<2; i++)
   {
       cout << "\n\n File Name: " << fileNames[i] << " \n";
      
       length = count_values(fileNames[i]);

       //Reading data from file
       arr = read_data(fileNames[i], length);

       //Finding average
       calc_average(arr, length);

       //Finding min and max
       calc_min_max(arr, length);
   }
  
   getchar();

   return 0;
}

Sample Output:

clusers saibabuldocuments visual studio 2010 File Name number3.txt Average of values:0.48872 Minimum Element 0.0182 Maxinun Elenent: 8.9736 File Name number4.txt Average of values:0.529747 Minimum Element: B Maxinum Element: 0.9924