fork(2) download

copy

#define __STDC_WANT_LIB_EXT1__ 1
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#define BUF_LEN 100 // Length of input buffer
#define COUNT 5 // Initial number of strings
int main(void)
{
	char buf[BUF_LEN]; // Input buffer
	size_t str_count = 0; // Current string count
	size_t capacity = COUNT; // Current maximum number of strings
	char **pS = calloc(capacity, sizeof(char*)); // Pointers to strings
	char** psTemp = NULL; // Temporary pointer to pointer to char
	char* pTemp = NULL; // Temporary pointer to char
	size_t str_len = 0; // Length of a string
	bool sorted = false; // Indicated when strings are sorted
	printf("Enter strings to be sorted, one per line. Press Enter to end:\n");
	// Read in all the strings
	char *ptr = NULL;
	while (true)
	{
		ptr = fgets(buf, BUF_LEN, stdin);
		if (!ptr) // Check for read error
		{
			printf("Error reading string.\n");
			free(pS);
			pS = NULL;
			return 1;
		}
		if (*ptr == '\n') break; // Empty line check
		if (str_count == capacity)
		{
			capacity += capacity / 4; // Increase capacity by 25%
			if (!(psTemp = realloc(pS, capacity))) return 1;
			pS = psTemp;
		}
		str_len = strnlen_s(buf, BUF_LEN) + 1;
		if (!(pS[str_count] = malloc(str_len))) return 2;
		strcpy_s(pS[str_count++], str_len, buf);
	}
	// Sort the strings in ascending order
	while (!sorted)
	{
		sorted = true;
		for (size_t i = 0; i < str_count - 1; ++i)
		{
			if (strcmp(pS[i], pS[i + 1]) > 0)
			{
				sorted = false; // We were out of order so. . .
				pTemp = pS[i]; // swap pointers pS[i]. . .
				pS[i] = pS[i + 1]; // and. . .
				pS[i + 1] = pTemp; // pS[i + 1]
			}
		}
	}
	// Output the sorted strings
	printf("Your input sorted in ascending sequence is:\n\n");
	for (size_t i = 0; i < str_count; ++i)
	{
		printf("%s", pS[i]);
		free(pS[i]); // Release memory for the word
		pS[i] = NULL; // Reset the pointer
	}
 

prog.c: In function ‘main’:
prog.c:38:3: warning: implicit declaration of function ‘strnlen_s’ [-Wimplicit-function-declaration]
   str_len = strnlen_s(buf, BUF_LEN) + 1;
   ^
prog.c:40:3: warning: implicit declaration of function ‘strcpy_s’ [-Wimplicit-function-declaration]
   strcpy_s(pS[str_count++], str_len, buf);
   ^
prog.c:46:3: error: ‘for’ loop initial declarations are only allowed in C99 mode
   for (size_t i = 0; i < str_count - 1; ++i)
   ^
prog.c:46:3: note: use option -std=c99 or -std=gnu99 to compile your code
prog.c:59:2: error: ‘for’ loop initial declarations are only allowed in C99 mode
  for (size_t i = 0; i < str_count; ++i)
  ^
prog.c:64:2: error: expected declaration or statement at end of input
  }
  ^
prog.c:64:2: warning: control reaches end of non-void function [-Wreturn-type]
  }
  ^

Standard output is empty