C Exercises: Extract words of 3 to 6 characters length from a given sentence

C Basic Declarations and Expressions: Exercise-146 with Solution

Write a C program to extract words of 3 to 6 characters length from a given sentence not more than 1024 characters.

Internet search engine giant, such as Google accepts web pages around the world and classify them, creating a huge database. The search engines also analyze the search keywords entered by the user and create inquiries for database search. In both cases, complicated processing is carried out in order to realize efficient retrieval, but basics are all cutting out words from sentences.

Input:
English sentences consisting of delimiters and alphanumeric characters are given on one line.

Sample Solution:

C Code:

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
int main() {
  char input_text[1536];
  int ctr = 0;
  char * temp;
  printf("English sentences consisting of delimiters and alphanumeric characters on one line:\n");
  fgets(input_text, sizeof(input_text), stdin);
  printf("\nExtract words of 3 to 6 characters length from the said sentence:\n");
  for (temp = strtok(input_text, " .,\n"); temp != NULL; temp = strtok(NULL, " .,\n")) {
    const int len = strlen(temp);

    if (3 <= len && len <= 6) {
      if (ctr++) putchar(' ');
      fputs(temp, stdout);
    }
  }
  puts("");

  return (0);
}

Sample Output:

English sentences consisting of delimiters and alphanumeric characters on one line:
w3resource.com

Extract words of 3 to 6 characters length from the said sentence:
com

Flowchart:

C programming Code Editor:

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