QUESTION Please i need help in documenting each line and als

QUESTION:

Please i need help in documenting each line and also a summary of what this program does...Thanks

1 #include <iostream>

2 #include <stdlib.h>
3 #include <cstring>
4
5 using namespace std;
6
7 int main()
8 {
9 char names[5][20], temp[20];
10 int t;
11 int index[5];
12 for (int i=0;i<5;i++)
13 index[i]=i;
14 for (int i= 0; i< 5; i++)
15 {cout<<\"\ enter name \"<< i+1<<\": \";
16 cin>>names[i];
17 };
18 //index sort
19 for (int k=0; k< 5-1; k++)
20 for (int i=0; i< 5-1; i++)
21 {if (strcmp(names[index[i]], names[index[i+1]]) >0)
22 { t = index[i];
23 index[i] = index[i+1];
24 index[i+1] = t;
25 }}
26
27 //print out sorted list using index
28 cout<<\"\ print sorted list using index. \";
29 for (int i=0; i< 5; i++)
30 cout<<\"\ \"<< names[index[i]];
31 //sort
32 for (int k=0; k< 5-1; k++)
33 for (int i=0; i< 5-1; i++)
34 {if (strcmp(names[i], names[i+1]) >0)
35 {//cout<<\"\ need to swap. \"<< names[i] <<\" and \" <<names[i+1];
36 strcpy(temp, names[i]);
37 //cout<<\"\ name in temp \"<<temp;
38 strcpy(names[i],names[i+1]);
39 //cout<<\"\ name in subsript \"<<i<< \" is \" <<names[i];
40 strcpy(names[i+1], temp);
41 //cout<<\"\ the name in names \"<<i<<\" is \"<<names[i];
42 }}
43 cout<<\"\ \ print out sorted list after sorting.\";
44 for (int i=0; i< 5; i++)
45 cout<<\"\ \"<< names[i];
46 cout<<endl;
47 char c;
48 cin>> c;
49 return 0;
50 }
51
52 /*
53 enter name 1: wilson
54 enter name 2: jones
55 enter name 3: galit
56 enter name 4: an
57 enter name 5: williams
58
59 print sorted list using index.
60 an
61 galit
62 jones
63 williams
64 wilson
65
66 print out sorted list after sorting.

67 an
68 galit
69 jones
70 williams
71 wilson
72
73
74 */

Solution

This program takes set of names as string input from the user ,sorts them in alphabetical order and print the names again in sorted order.

we include string.h and stdlib.h to use predefined String functions

Use the for loop to take multiple name input.

Using a double for loop compare each string with every other string using strcmp method and swap strings indexes in index array using strcpy method

This process is applied until all the strings indexes arr sorted alphabetically

Then the strings are arranged in the names array using another double for loop and index array values

Finally using another double for loop we print the names in sorted order in the names array

Declare one 2D array to store multiple names,declare one 1D char array to store temporary names.