Not in functions You are required to open an input file (shown below) then read
ID: 3712691 • Letter: N
Question
Not in functions
You are required to open an input file (shown below) then read one character at
a time until all characters in the file are all read. While reading the content
of the file, keep a count of the following:
1)
Count of each digit read. The counts should be kept in an int array of
size 10.
2)
Count of each alphabetic character read irrespective if it is an upper
case or lower case. The counts should be kept in an int array of size 26.
3)
Count of whitespace characters. A whitespace includes the blank (space) ‘
’, new line character , tab character , form feed , Vertical tab
and carriage return .
4)
Count of all other characters not alphabetic, not a digit and not a
whitespace.
5)
Total count of all characters read.
After reading and processing the file, and get each count correctly, you will
display each letter of alphabet and its count, each digit and its count, count
of whitespaces and all other counts.
Your solution must use
FUNCTIONAL DECOMPOSITION.
Explanation / Answer
Java Code:
import java.io.*;
import java.util.*;
class test
{
public static void main(String []args)throws IOException{
Scanner sc = new Scanner(System.in);
System.out.println("Enter the name of the file: ");
String fname = sc.next();
FileReader fr = new FileReader(fname);
int numFreq[]=new int[10]; //stores the frequency of numbers
int charFreq[]=new int[26];//stores the frequency of characters
String whiteSpace[]={"Blank Space","New line","Tab","form feed","Vertical Tab","Carriafge return "};
int whiteSpaceFreq[]=new int[6];
int othersFreq=0; //stores frequency of non-digit,letter or whitespace characters
int totalChars=0;//stores total characters
int i;
while ((i=fr.read()) != -1){
char inp=(char)i;
totalChars++;
//if inp is a digit record its count
if(inp>=48 && inp<=57){
numFreq[inp-'0']++;
}
//if inp is a upper case character increase its count
else if(inp>=65 && inp<=90){
charFreq[inp-'A']++;
}
//if inp is a lower case character increase its count
else if(inp>=97 && inp<=122){
charFreq[inp-'a']++;
}
//if inp is a whitespace character increse its frequency
else if(inp==' ')
whiteSpaceFreq[0]++;
else if(inp==' ')
whiteSpaceFreq[1]++;
else if(inp==' ')
whiteSpaceFreq[2]++;
else if(inp==' ')
whiteSpaceFreq[3]++;
else if(inp==' ')
whiteSpaceFreq[5]++;
else
othersFreq++;
}
//printing results
System.out.println("Digits: ");
for( i=0;i<10;i++){
System.out.println(i+" " +numFreq[i]);
}
System.out.println("Characters: ");
for( i=0;i<26;i++){
System.out.println((char)(97+i) +" " +charFreq[i]);
}
System.out.println("Whitespace Characters: ");
for( i=0;i<6;i++){
System.out.println(whiteSpace[i] +" " +whiteSpaceFreq[i]);
}
System.out.println("other characters: "+othersFreq);
System.out.println("Total characters: "+totalChars);
}
}
Sample input output:
radas-macOS:Desktop radas$ java test
Enter the name of the file:
wrongWords.txt
Digits:
0 0
1 2
2 2
3 3
4 0
5 3
6 0
7 0
8 0
9 0
Characters:
a 1
b 0
c 0
d 3
e 0
f 3
g 2
h 1
i 1
j 2
k 1
l 0
m 0
n 0
o 0
p 0
q 1
r 0
s 1
t 0
u 2
v 0
w 3
x 0
y 0
z 0
Whitespace Characters:
Blank Space 0
New line 2
Tab 2
form feed 0
Vertical Tab 0
Carriafge return 0
other characters: 0
Total characters: 35
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