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  1. #include<stdio.h>
  2. #include <string.h>
  3.  
  4. //for using tolower
  5. #include <ctype.h>
  6. int main() {
  7.     int i, k, j, n=0;
  8.     char abc[25];
  9.     const char *stop = "stop";
  10.     char *p; //using for lowercase
  11.     //using 2d array for max of 10,000 words, max size of words 25
  12.     char str[10000][25], temp[25];
  13.  
  14.     printf("Enter up to 10000 words, type stop to enter the current words:\n");
  15.     while (scanf("%24s", abc)>0 && strncmp(abc, "stop", 5) != 0) {
  16.         strncpy (str[n++], abc, 25); 
  17.     }
  18.     //printf("YES\n");
  19.     //return (1);
  20.  
  21.         for (i = 0; i < n; ++i)
  22.             for (k = i + 1; k < n; ++k) {
  23.                 //comparing two strings using strcmp() function is used
  24.                 //using strcpy() to copy string to a temp
  25.                 if (strcmp(str[i], str[k]) > 0) {
  26.                     strcpy(temp, str[i]);
  27.                     strcpy(str[i], str[k]);
  28.                     strcpy(str[k], temp);
  29.                 }
  30.             }
  31.  
  32.         //using pointer to converting to lowercase
  33.         //src: https://w...content-available-to-author-only...b.com/programming/software-development/threads/57296/how-does-one-tolower-an-entire-string
  34.         for (i =0; i<n; i++) 
  35.             for (p = str[i]; *p != '\0'; p++)
  36.                 *p = (char) tolower(*p);
  37.  
  38.         //printing words in lexi order
  39.         printf("\nWords in lexicographical order: \n");
  40.         for (i = 0; i < n; ++i) {
  41.             puts(str[i]);
  42.         }
  43.         printf("WARNING: Words longer than 25 in length were ignored. \n");
  44.  
  45.         return 0;
  46.  
  47. }
Success #stdin #stdout 0s 3596KB
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stdin
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hello stop
stdout
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Enter up to 10000 words, type stop to enter the current words:

Words in lexicographical order: 
hello
WARNING: Words longer than 25 in length were ignored.
https://ideone.com/TKZR3O
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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