I need help solving this question in C PROGRAM FORMAT!! THANK YOU :-)

Question

12.11 LAB: Word frequencies

Write a program that reads a list of words. Then, the program outputs those words and their frequencies. The input begins with an integer indicating the number of words that follow. Assume that the list will always contain fewer than 20 words.

Ex: If the input is:

5 hey hi Mark hi mark

the output is:

hey - 1

hi - 2

Mark - 1

hi - 2

mark - 1

Hint: Use two arrays, one array for the strings and one array for the frequencies

Answer 1

Here's my implementation:

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

int main(int argc, char **argv) {

if (argc < 2) {

printf("Usage: %s <file>\n", argv[0]);

return 0;

}

FILE *f = fopen(argv[1], "r");

int words_to_read = 0;

if (fscanf(f, "%d", &words_to_read) > 0) {

int wordcount = 0;

char *words[20] = {0};

int wordscount[20] = {0};

for (int i=0; i<words_to_read && i <20; i++) {

char buffer[80];

if (fscanf(f, "%s", buffer) > 0) {

int j;

for (j=0; j<wordcount; j++) {

if (!strcmp(buffer, words[j])) {

wordscount[j]++;

break;

}

}

if (j == wordcount) {

words[j] = strdup(buffer);

wordscount[j]++;

wordcount++;

}

}

}

for (int i=0; i<wordcount; i++) {

printf("%s - %d\n", words[i], wordscount[i]);

free(words[i]);

}

}

fclose(f);

return 0;

}

And here's the output given a file with the above input:

> ./a.out test.txt

hey - 1

hi - 2

Mark - 1

mark - 1

I decided not to print "hi" twice, since that didn't seem to make sense to do.