Write a program that sorts a series of words entered by the user: Each word is n

Question

Write a program that sorts a series of words entered by the user:

Each word is no more than 20 characters long and the program stops reading when the user enters an empty word (i.e., presses enter without entering a word). Store each word in a dynamically allocated string using an array of pointers to keep track of the string, as in the remind2.c program in section 17.2 of C Progrmamming a Modern Approach. After all words have been read, sort the array (using any sorting technique) and then use a loop to print the words in sorted order. Use the read_line function below to read each word as in remind2.c

Here's the read_line function:

Here is my code:

#include <stdio.h>

#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#define TOTALWORDS 20
#define LENGTH 20

int read_line(char str[], int n);

int main(){

   int i;
   int length;
   int x = 0;
   char word[LENGTH + 1];
   char *words[TOTALWORDS];

   for(;;){
       if(x == TOTALWORDS){
           printf("No space ");
           break;
       }
  
       printf("Enter word: ");
       length = read_line(word, TOTALWORDS);

       if(length == 0){
           break;
       }

       *(words + x) = malloc(length);
      
       if(*(words + x) == NULL){
           printf("Failure... Exiting ");
           exit(0);
       }

       strcpy(*(*length + x), word);
       ++x;
   }

   printf("In sorted order:");
   for(i = 0; i < x; ++i){
       printf("%s ", (*(*length + i)));
       free(*(*length + i));
   }

   return 0;

}

int read_line(char str[], int n){
   int ch, i = 0;
  
   while ((ch = getchar()) != ' ') {
       if (i < n){
           str[i++] = ch;
       }
   }
  
   str[i] = '';

   return i;
}

Please help.

#include <stdio.h>

#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#define TOTALWORDS 20
#define LENGTH 20

int read_line(char str[], int n);

int main(){

   int i;
   int length;
   int x = 0;
   char word[LENGTH + 1];
   char *words[TOTALWORDS];

   for(;;){
       if(x == TOTALWORDS){
           printf("No space ");
           break;
       }
  
       printf("Enter word: ");
       length = read_line(word, TOTALWORDS);

       if(length == 0){
           break;
       }

       *(words + x) = malloc(length);
      
       if(*(words + x) == NULL){
           printf("Failure... Exiting ");
           exit(0);
       }

       strcpy(*(*length + x), word);
       ++x;
   }

   printf("In sorted order:");
   for(i = 0; i < x; ++i){
       printf("%s ", (*(*length + i)));
       free(*(*length + i));
   }

   return 0;

}

int read_line(char str[], int n){
   int ch, i = 0;
  
   while ((ch = getchar()) != ' ') {
       if (i < n){
           str[i++] = ch;
       }
   }
  
   str[i] = '';

   return i;
}

Explanation / Answer

#include <stdio.h>
#include <stdlib.h>

int int_compare(const void* p, const void* q);

int main()
{
int n, i;
int *a;

printf("Enter the length of the array: ");
scanf("%d", &n);
  
a = malloc(n*sizeof(int));

for(i = 0; i < n; i++)
{
printf("Enter a number: ");
scanf("%d", &a[i]);
}   
  
qsort(a, n, sizeof(int), int_compare);

printf("In sorted order: ");

for(i = 0; i < n; i++)
printf("%d ", a[i]);

printf(" ");

return 0;
}

int int_compare(const void* p, const void* q){

int n1 = *(int *) p;
n1 = *(int *) p;
int n2 = *(int *) q;

if (n1 < n2)
return -1;

if (n1 == n2)
return 0;

return 1;
}
  

int read_line(char str[], int n)
{
int ch, i = 0;
while ((ch = getchar()) != ' ') {
if (i < n)
str[i++] = ch;
}
str[i] = '';
return i;   
}

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