Code# 80:C Program To Find All Substrings Of String

#include <stdio.h>
#include <string.h>
#include <malloc.h>

char* substring(char*, int, int);

main()
{
   char string[100], *pointer;
   int position = 1, length = 1, temp, string_length;

   printf("Enter a string\n");
   gets(string);

   temp = string_length = strlen(string);

   printf("Substring of \"%s\" are\n", string);

   while (position <= string_length)
   {
      while (length <= temp)
      {
         pointer = substring(string, position, length);
         printf("%s\n", pointer);
         free(pointer);
         length++;
      }
      temp--;
      position++;
      length = 1;
   }

   return 0;
}

/* Use substring function given in above c program*/ 
Output:
Enter a string
coding
Substring of "coding" are
c
co
cod
codi
codin
coding
o
od
odi
odin
oding
d
di
din
ding
i
in
ing
n
ng
g