Question

Write a complete C program that inputs a paragraph of text and prints out each unique letter found in the text along with the number of times it occurred. A sample run of the program is given below.

You should input your text from a data file specified on the command line. Your output should be formatted and presented exactly like the sample run (i.e. alphabetized with the exact spacings and output labels). The name of your data file along with the text in the file should be echo printed to the screen. Ignore all characters that are not letters (i.e. you should count only the letters in the range a–z and A–Z).

You should only turn in a stand-alone, complete application program that retrieves the name of the data file from the command line. Be sure to subdivide the work of your program into several functions as appropriate. You may not use any global variables (preprocessor constants are OK).

I have a code written below, but can you create a similar one replacing temp, argc, argv, and EOF with something else because we haven't learned how to use those yet. do use fgets to read.

Need help ASAP please!

//code

#include <stdio.h>

#include <string.h>

//this function reads file and calculate frequencies

void read(FILE *infile, int *small_letters, int *capital_letters)

{

char temp;

while (1)

{

temp = fgetc(infile);

if (temp == EOF)

break;

if (temp >= 'a' && temp <= 'z')

{

small_letters[temp - 'a']++;

}

if (temp >= 'A' && temp <= 'Z')

{

capital_letters[temp - 'A']++;

}

}

}

//this function prints frequencies of letters if not 0

void print(int *small_letters, int *capital_letters)

{

printf("Frequency of each character:\n");

for (int i = 0; i < 27; i++)

{

if (small_letters[i] != 0)

printf("%c: %d\n", 'a' + i, small_letters[i]);

if (capital_letters[i] != 0)

printf("%c: %d\n", 'A' + i, capital_letters[i]);

}

}

int main(int argc, char **argv)

{

//no file name passes

if (argc < 2)

{

printf("No inputfile specified!!");

return 0;

}

char filename[100];

strcpy(filename, argv[1]);

printf("Filename: %s\n", filename);

FILE *infile = fopen(filename, "r");

//can't open file

if (infile == NULL)

{

printf("Can't open input file");

return 0;

}

int small_letters[27] = {0}, capital_letters[27] = {0};

read(infile, small_letters, capital_letters);

fclose(infile);

print(small_letters, capital_letters);

}

Answer 1

If you have any doubts, please give me comment...

#include <stdio.h>

#include <string.h>

//this function reads file and calculate frequencies

void read(FILE *infile, int *small_letters, int *capital_letters)

{

char temp[1000];

while(fgets(temp, 100, infile)){

int i=0;

while(temp[i]!='\0'){

if (temp[i] >= 'a' && temp[i] <= 'z')

{

small_letters[temp[i] - 'a']++;

}

else if(temp[i] >= 'A' && temp[i] <= 'Z')

{

capital_letters[temp[i] - 'A']++;

}

i++;

}

}

}

//this function prints frequencies of letters if not 0

void print(int *small_letters, int *capital_letters)

{

printf("Frequency of each character:\n");

for (int i = 0; i < 26; i++)

{

if (small_letters[i] != 0)

printf("%c: %d\n", ('a' + i), small_letters[i]);

if (capital_letters[i] != 0)

printf("%c: %d\n", ('A' + i), capital_letters[i]);

}

}

int main(int argc, char **argv)

{

//no file name passes

if (argc < 2)

{

printf("No inputfile specified!!");

return 0;

}

char filename[100];

strcpy(filename, argv[1]);

printf("Filename: %s\n", filename);

FILE *infile = fopen(filename, "r");

//can't open file

if (infile == NULL)

{

printf("Can't open input file");

return 0;

}

int small_letters[26] = {0}, capital_letters[26] = {0};

read(infile, small_letters, capital_letters);

fclose(infile);

print(small_letters, capital_letters);

return 0;

}