Solved Homework: Question: Write a C program named as listLetterFreq.c that lists the frequency of the letters from the inpu…

Write a C program named as listLetterFreq.c that lists the frequency of the letters from the input via ignoring the case sensitivity. For example, sample outputs could be like below şcat test.txt This is a list of courses csc 1010 - COMPUTERS &APPLICATIONS ş . / listLetterFreq < test.txt Letter a or A appears 3 times Letter b or B appears 0 times Letter c or C appears 5 times etter d or D appears 0 times Letter e or E appears 2 times Letter f or F appears 1 times Letter g or G appears 0 times Letter h or H appears 1 times Letter i or I appears 5 times Letter i or J appears 0 times Letter k or K appears 0 times Letter l or L appears 2 times Letter m or M appears 1 times Letter n or N appears 1 times Letter o or O appears 4 times Letter p or P appears 3 times Letter q or Q appears 0 times Letter r or R appears 2 times Letter s or S appears 8 times Letter t or T appears 4 times Letter u or U appears 2 times Letter v or V appears 0 times Letter w or W appears 0 times Letter x or X appears 0 times Letter y or Y appears 0 times Letter z or Z appears 0 times

Write a C program named as listLetterFreq.c that lists the frequency of the letters from the input via ignoring the case sensitivity. For example, sample outputs could be like below şcat test.txt This is a list of courses csc 1010 – COMPUTERS &APPLICATIONS ş . / listLetterFreq

Expert Answer

answers

#include<stdio.h>

#include<string.h>

int main()

{

char str[50];

 

printf(“Enter the name of file : “);

scanf(“%s”, str);

 

// open file in read mode

FILE *ptr = fopen(str, “r”);

 

printf(“nContents of %s …nn”, str);

 

// store the number of times character has appeared in the string

// index 0 is fo a

// index 1 is fo b

// index 2 is fo c

// .

// .

// .

// index 25 is for z

int arr[26];

 

int i;

 

// set the count of each character to 0

for( i = 0 ; i < 26 ; i++ )

arr[i] = 0;

 

// read a character in a file

char ch = fgetc(ptr);

 

// loop untill file ends

while( ch != EOF )

{

// read a character in a file

ch = fgetc(ptr);

 

// get the ascii code of current character

// tolower() converts the character passed as argument in lower case

int ascii = (int)tolower(ch);

 

if( ascii >= 97 && ascii <= 122 )

{

// get the index of character in arr

int index = ascii  97;

 

// increase the frequency of current character

arr[index]++;

}

}

 

// close the file

fclose(ptr);

 

for( i = 0 ; i < 26 ; i++ )

printf(“Letter %c or %c appears %d timesn”, (char)( i + 97 ), (char)( i + 65 ) , arr[i]);

 

return 0;

}

————————test.txt———————–

This is a list of courses.
CSC 1010 – COMPUTERS & APPLICATIONS

Sample Output

Enter the name of file: test.txt Contents of test.txt Letter a or A appears 3 times Letter b or B appears e times Letter c or C appears 5 times Letter d or D appears times Letter e or E appears 2 times Letter f or F appears 1 times Letter g or G appears times Letter h or H appears 1 times Letter i or I appears 5 times Letter j or J appears times Letter k or K appears times Letter 1 or L appears 2 times Letter m or M appears 1 times Letter n or N appears 1 times Letter o or o appears 4 times Letter p or P appears 3 times Letter q or Q appears times Letter r or R appears 2 times Letter s or S appears 8 times Letter t or T appears 3 times Letter u or U appears 2 times Letter v or V appears e times Letter w or W appears e times Letter x or X appears e times Letter y or Y appears times Letter z or Z appears times

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