Task 1: Vertical Histogram You will write a program that prints a histogram of frequencies of letters in the English alphabet. The input will come from stdin. Your program should downcase all input letters and ignore symbols besides a to z. The output is a histogram rendered vertically. Please make sure you must support reading multiple lines if you pipe the input from a file using the cat command. Code and Compilation: Your code will be one standalone file called vert_hist. c. Use the following command to generate an executable vert_hist. Your code must compile clean with this command. gcc -Wall -W -pedantic -o vert_hist vert_hist.c Example: Below is an example assuming vert_hist has been compiled and lives in the current directory. Each * represents a count of 1. echo This Is a TeST--Hello, MississippI. Yippie | ./vert_hist * * * * * * * * abcdefghijklmnopqrstuvwxyz Hint: Learn about the function getchar. Furthermore, you can use cat and pipe to test this program. For example, the command "cat poem.txt | ./vert_hist” will read poem. txt and send it to the stdin of your program. Hint #2: A few functions in ctypes.h will prove to be useful. For example, what does tolower do? How about isalpha? Use the man command to find out.
Task 1: Vertical Histogram You will write a program that prints a histogram of frequencies of letters in the English alphabet. The input will come from stdin. Your program should downcase all input letters and ignore symbols besides a to z. The output is a histogram rendered vertically. Please make sure you must support reading multiple lines if you pipe the input from a file using the cat command. Code and Compilation: Your code will be one standalone file called vert_hist. c. Use the following command to generate an executable vert_hist. Your code must compile clean with this command. gcc -Wall -W -pedantic -o vert_hist vert_hist.c Example: Below is an example assuming vert_hist has been compiled and lives in the current directory. Each * represents a count of 1. echo This Is a TeST--Hello, MississippI. Yippie | ./vert_hist * * * * * * * * abcdefghijklmnopqrstuvwxyz Hint: Learn about the function getchar. Furthermore, you can use cat and pipe to test this program. For example, the command "cat poem.txt | ./vert_hist” will read poem. txt and send it to the stdin of your program. Hint #2: A few functions in ctypes.h will prove to be useful. For example, what does tolower do? How about isalpha? Use the man command to find out.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Transcribed Image Text:Task 1: Vertical Histogram
You will write a program that prints a histogram of frequencies of letters in the English alphabet. The
input will come from stdin. Your program should downcase all input letters and ignore symbols besides
a to z. The output is a histogram rendered vertically. Please make sure you must support reading
multiple lines if you pipe the input from a file using the cat command.
Code and Compilation: Your code will be one standalone file called vert_hist. c. Use the following
command to generate an executable vert_hist. Your code must compile clean with this command.
gcc -Wall -W -pedantic -o vert_hist vert_hist.c
Example: Below is an example assuming vert_hist has been compiled and lives in the current
directory. Each * represents a count of 1.
echo This Is a TeST--Hello, MississippI. Yippie | ./vert_hist
*
*
*
%
abcdefghijklmnopqrstuvwxyz
Hint: Learn about the function getchar. Furthermore, you can use cat and pipe to test this
program. For example, the command "cat poem.txt | ./vert_hist" will read poem. txt and send
it to the stdin of your program.
Hint #2: A few functions in ctypes.h will prove to be useful. For example, what does tolower do?
How about isalpha? Use the man command to find out.
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