Question

CREATE TWO C++ PROGRAMS :

Program 1

Write a program that reads in babynames.txt (provided) and outputs the top 20 names, regardless of gender.

The file has the following syntax:

RANK# BoyName Boy#OfBirths Boy% GirlName Girl#OfBirths Girl%

You should ignore the rank and percentages. Compare the number of births to rerank.

Output should go to standard out.

Program 2

Write a program that reads a text file containing floating-point numbers. Allow the user to specify the source file name on the command-line. If the user doesn’t specify any file name, then prompt the user for the file name (cin).

Compute the average of the numbers in the file and output it to a file named “results.txt”.

Example output

Program 1 (not test output, however, will look like this)

1. John
2. Jane
3. Mary

Program 2

Note: program will have no output to standard in when a command line argument is provided.

Source filename: SSSS

Contents of “results.txt” afterwards:

3412.2345

FOR PROGRAM 1 - how the text file babynames.txt looks:

1  Michael  462085  2.2506  Jessica  302962  1.5436
2  Christopher  361250  1.7595  Ashley  301702  1.5372
3  Matthew  351477  1.7119  Emily  237133  1.2082
4  Joshua  328955  1.6022  Sarah  224000  1.1413
5  Jacob  298016  1.4515  Samantha  223913  1.1408
6  Nicholas  275222  1.3405  Amanda  190901  0.9726
7  Andrew  272600  1.3277  Brittany  190779  0.9720
8  Daniel  271734  1.3235  Elizabeth  172383  0.8783
9  Tyler  262218  1.2771  Taylor  168977  0.8609
10  Joseph  260365  1.2681  Megan  160312  0.8168
11  Brandon  259299  1.2629  Hannah  158647  0.8083
12  David  253193  1.2332  Kayla  155844  0.7940
13  James  244775  1.1922  Lauren  153530  0.7822
14  Ryan  241105  1.1743  Stephanie  149725  0.7628
15  John  239730  1.1676  Rachel  148907  0.7587
16  Zachary  225188  1.0968  Jennifer  147948  0.7538
17  Justin  220012  1.0716  Nicole  136033  0.6931
18  William  217588  1.0598  Alexis  131117  0.6680
19  Anthony  216088  1.0525  Victoria  117386  0.5981
20  Robert  205313  1.0000  Amber  115551  0.5887
21  Jonathan  197250  0.9607  Alyssa  115213  0.5870
22  Austin  190053  0.9257  Courtney  113257  0.5770
23  Alexander  183797  0.8952  Danielle  109541  0.5581
24  Kyle  180151  0.8774  Rebecca  109514  0.5580
25  Kevin  165085  0.8041  Jasmine  105247  0.5362
26  Thomas  146515  0.7136  Brianna  99046  0.5046
27  Cody  146426  0.7132  Katherine  96812  0.4933
28  Jordan  144661  0.7046  Alexandra  94743  0.4827
29  Eric  135145  0.6582  Madison  91870  0.4681
30  Benjamin  133718  0.6513  Morgan  91162  0.4645
31  Aaron  128202  0.6244  Melissa  89932  0.4582
32  Christian  125899  0.6132  Michelle  86458  0.4405
33  Samuel  125196  0.6098  Kelsey  85120  0.4337
34  Dylan  122008  0.5942  Chelsea  84781  0.4320
35  Steven  121009  0.5894  Anna  78320  0.3990
36  Brian  119216  0.5806  Kimberly  77846  0.3966
37  Jose  118843  0.5788  Tiffany  77493  0.3948
38  Timothy  107680  0.5245  Olivia  75854  0.3865
39  Nathan  107229  0.5223  Mary  75247  0.3834
40  Adam  106822  0.5203  Christina  74601  0.3801
41  Richard  94805  0.4618  Allison  74398  0.3791
42  Patrick  92874  0.4523  Abigail  72691  0.3704
43  Charles  92372  0.4499  Sara  72064  0.3672
44  Sean  91953  0.4479  Shelby  71974  0.3667
45  Jason  91622  0.4462  Heather  71603  0.3648
46  Cameron  81097  0.3950  Haley  71168  0.3626
47  Jeremy  77749  0.3787  Maria  70741  0.3604
48  Mark  75751  0.3689  Kaitlyn  67544  0.3441
49  Stephen  75064  0.3656  Laura  67109  0.3419
50  Jesse  73701  0.3590  Erin  65312  0.3328
51  Juan  70809  0.3449  Andrea  65183  0.3321
52  Alex  70772  0.3447  Natalie  63348  0.3228
53  Travis  68176  0.3321  Jordan  61736  0.3145
54  Jeffrey  66961  0.3261  Brooke  60614  0.3088
55  Ethan  66878  0.3257  Julia  59899  0.3052
56  Caleb  66212  0.3225  Emma  57961  0.2953
57  Luis  64656  0.3149  Vanessa  57868  0.2948
58  Jared  63748  0.3105  Erica  55740  0.2840
59  Logan  63541  0.3095  Sydney  55737  0.2840
60  Hunter  60499  0.2947  Kelly  55710  0.2838
61  Trevor  59912  0.2918  Kristen  53066  0.2704
62  Bryan  59704  0.2908  Katelyn  52795  0.2690
63  Evan  59366  0.2891  Marissa  51191  0.2608
64  Paul  58833  0.2865  Amy  51141  0.2606
65  Taylor  58384  0.2844  Crystal  51055  0.2601
66  Kenneth  58223  0.2836  Paige  50539  0.2575
67  Connor  57363  0.2794  Cassandra  50342  0.2565
68  Dustin  56742  0.2764  Gabrielle  49787  0.2537
69  Noah  56093  0.2732  Katie  49168  0.2505
70  Carlos  55095  0.2683  Caitlin  49011  0.2497
71  Devin  55039  0.2681  Lindsey  48968  0.2495
72  Gabriel  54756  0.2667  Destiny  48199  0.2456
73  Ian  53974  0.2629  Kathryn  47111  0.2400
74  Nathaniel  52541  0.2559  Jacqueline  46051  0.2346
75  Gregory  52063  0.2536  Shannon  45900  0.2339
76  Derek  50732  0.2471  Jenna  45839  0.2335
77  Corey  50201  0.2445  Angela  45134  0.2300
78  Jesus  49036  0.2388  Savannah  44685  0.2277
79  Scott  48999  0.2387  Mariah  44570  0.2271
80  Bradley  48063  0.2341  Alexandria  44194  0.2252
81  Dakota  46628  0.2271  Sierra  43603  0.2222
82  Antonio  46507  0.2265  Alicia  43463  0.2214
83  Marcus  46434  0.2262  Briana  42781  0.2180
84  Blake  45846  0.2233  Miranda  42207  0.2150
85  Garrett  45305  0.2207  Jamie  41425  0.2111
86  Edward  45098  0.2197  Catherine  40718  0.2075
87  Luke  44381  0.2162  Brittney  40018  0.2039
88  Shawn  42450  0.2068  Breanna  40011  0.2039
89  Peter  42317  0.2061  Grace  39814  0.2029
90  Seth  42176  0.2054  Monica  38866  0.1980
91  Mitchell  41997  0.2045  Sabrina  38638  0.1969
92  Adrian  41952  0.2043  Madeline  36949  0.1883
93  Victor  41016  0.1998  Caroline  36789  0.1874
94  Miguel  40947  0.1994  Molly  36540  0.1862
95  Shane  40577  0.1976  Erika  35055  0.1786
96  Chase  40287  0.1962  Mackenzie  34769  0.1771
97  Isaac  40183  0.1957  Leah  34040  0.1734
98  Spencer  38164  0.1859  Diana  33747  0.1719
99  Lucas  38141  0.1858  Whitney  32877  0.1675
100  Jack  37456  0.1824  Cheyenne  31825  0.1621

Answer 1

Program 1:

#include <iostream>
#include <string>
#include <fstream>
#include <vector>
#include <algorithm>

using namespace std;

struct Baby{
   string name;
   int births;
};

//Comparator function for STL's sort() function
bool comparator(Baby b1, Baby b2){
   return (b1.births > b2.births);
}

int main(){
   vector<Baby> babies;
   ifstream in("babynames.txt");//Open a file to read
   if(!in){
      cout << "Error: Cannot open file" << endl;
      exit(EXIT_FAILURE);
   }
   string name;
   int rank, births;
   float percentage;
   Baby b;
   //Read from file
   while(!in.eof()){
      //Read boy's data
      in >> rank >> name >> births >> percentage;
      b.name = name;
      b.births = births;
      babies.push_back(b);
      //Read girl's data
      in >> name >> births >> percentage;
      b.name = name;
      b.births = births;
      babies.push_back(b);
   }
   in.close();//Close file
   //Sort babies vector in descending order
   sort(babies.begin(), babies.end(), comparator);
   //Print baby names with new ranks
   for(int i = 0; i < babies.size(); i++){
      cout << i + 1 << ". " << babies[i].name << endl;
   }
   return 0;
}

Output:

Program 2:

#include <iostream>
#include <string>
#include <fstream>

using namespace std;

int main(int argc, char **argv){
   string filename;
   if(argc == 1){
      cout << "Enter input file name: ";
      cin >> filename;
   }
   else{
      filename = argv[1];
   }
   ifstream in(filename);//Open a file to read
   if(!in){
      cout << "Error: Cannot open file" << endl;
      exit(EXIT_FAILURE);
   }
   int count = 0;
   float num, avg = 0.0f;
   //Read from file
   while(!in.eof()){
      in >> num;
      count++;
      avg += num;
   }
   in.close();//Close file
   avg = avg/count;
   ofstream out("results.txt");//Open file to output result
   out << avg;
   out.close();//Close file
   return 0;
}

File input:

Command line output:

File output: