Write a C program line_char.c which reads a line from its input then reads an integer n from its input.

It should write the character in position n from the line in the format given in the examples below.

Your program should then exit - it should not read more lines.

For example:

dcc -o line_char line_char.c
./line_char
abcdefghijklmnopqrstuvwxyz
0
The character in position 0 is 'a'
./line_char
abcdefghijklmnopqrstuvwxyz
13
The character in position 13 is 'n'
./line_char
abcdefghijklmnopqrstuvwxyz
25
The character in position 25 is 'z'
./line_char
Andrew Rocks!
6
The character in position 6 is ' '
./line_char
Andrew Rocks!
7
The character in position 7 is 'R'
./line_char
Andrew Rocks!
12
The character in position 12 is '!'

No error checking is necessary.

You can assume a line can be read.

You can assume the line will contain at most 256 characters.

You can assume a positive integer n can be read.

You can assume the line read has at least n characters.

When you think your program is working you can autotest to run some simple automated tests:

1511 autotest line_char

When you are finished working on this exercise you must submit your work by running give:

give cs1511 test10_line_char line_char.c

Write a C program reverse_lines.c which reads lines and writes them out with the characters of each line in reverse order. It should stop when it reaches the end of input.

For example:

dcc -o reverse_lines reverse_lines.c
./reverse_lines
Two roads diverged in a yellow wood,
,doow wolley a ni degrevid sdaor owT
And sorry I could not travel both
htob levart ton dluoc I yrros dnA
And be one traveler, long I stood
doots I gnol ,relevart eno eb dnA
To where it bent in the undergrowth;
;htworgrednu eht ni tneb ti erehw oT
You don't make friends with salad.
.dalas htiw sdneirf ekam t'nod uoY

You can assume lines will contain at most 256 characters.

You can assume lines are terminated with a newline ('\n') character,

When you think your program is working you can autotest to run some simple automated tests:

1511 autotest reverse_lines

When you are finished working on this exercise you must submit your work by running give:

give cs1511 test10_reverse_lines reverse_lines.c

Write a C program remove_repeated_lines.c which reads lines and prints them unless it has seen exactly the same line previously.

In other words it doesn't print repeated lines. It prints our only the first occurrence of any line.

It should stop when it reaches the end of input.

For example:

dcc -o remove_repeated_lines remove_repeated_lines.c
./remove_repeated_lines
one
one
hello world
hello world
two
two
one
hello world
two
hello
hello

./remove_repeated_lines
Na, na, na, na, na
Na, na, na, na, na
Na, na, na
Na, na, na
Na, na, na, na, na
Na, na, na
Do, do, do, do, do,
Do, do, do, do, do,
Do, do, do
Do, do, do
Do, do, do, do, do,
Do, do, do

You can assume lines will contain at most 256 characters.

You assume at most 256 lines will be read before end-of-input.

You can assume lines are terminated with a newline ('\n') character,

When you think your program is working you can autotest to run some simple automated tests:

1511 autotest remove_repeated_lines

When you are finished working on this exercise you must submit your work by running give:

give cs1511 test10_remove_repeated_lines remove_repeated_lines.c

When you are finished each exercise make sure you submit your work by running give.

You can run give multiple times. Only your last submission will be marked.

Don't submit any exercises you haven't attempted.

If you are working at home, you may find it more convenient to upload your work via give's web interface.

Remember you have until Thursday 17 May 23:59:59 to complete this test.

Automarking will be run several days after the submission deadline for the test. When complete you can view automarking here and you can view the the resulting mark via give's web interface