Thread: Code Hangs! Help please!

Code:

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

typedef struct SUF_TREE
{
   char *edge_label;
   struct SUF_TREE *child1;
   struct SUF_TREE *child2;
   struct SUF_TREE *child3;
   struct SUF_TREE *child4;
   struct SUF_TREE *child5;
   struct SUF_TREE *child6;
}*suf_tr;

suf_tr Build_Suf_Tree(char *str,unsigned str_len)
{
     unsigned loop1,loop2;

	 suf_tr ROOT;

	 ROOT = (suf_tr)calloc(1,sizeof(struct SUF_TREE));

	 for(unsigned suf_no = 0; suf_no < str_len; suf_no++)
	 {
	     char *temp_str = (char*)calloc(str_len - suf_no + 1,sizeof(char));

	     for(loop1 = suf_no, loop2 = 0; loop1 <= str_len + 1; loop1++, loop2++)
		     temp_str[loop2] = str[loop1];
		 temp_str[loop2+1] = '\0';

		 suf_tr new_node = (suf_tr)calloc(1,sizeof(struct SUF_TREE));
		 //new_node->edge_label = (char*)calloc(str_len - suf_no + 1,sizeof(char));
		 //strcpy(new_node -> edge_label,temp_str);

		 //puts(temp_str);

		 printf(temp_str);

		 //free(temp_str);
		 //free(new_node);

	     //puts(new_node -> edge_label); free(temp_str);

	 }
	 //return ROOT;
}


int main()
{
   unsigned str_len=7;
   char *str;
   suf_tr ROOT;

   //printf("Enter the length of the string : ");
   //scanf("%u",&str_len);

   str = (char*)calloc(str_len+1,sizeof(char));

   fflush(stdin);

   //printf("Enter the string : ");
   //scanf("%s",str);

   str = "anirban$";

   //str[str_len]= '$'; str[str_len+1] = '\0';

   //puts(str);

   ROOT = Build_Suf_Tree(str,str_len);

   return EXIT_SUCCESS;
}

Tested in Code Blocks! When traced works fine...but when run hangs!!! Some problem in the function Build_Suf_Tree... Please help anyone!

Read the FAQ.

Cprogramming.com FAQ > Why fflush(stdin) is wrong
Cprogramming.com FAQ > Casting malloc

Are you compiling as C++? Your indentation is inconsistent. Turn up your compiler warnings. If you're using GCC, use

gcc -ansi -pedantic -Wall -Werror file.c -o program.exe

I am compiling as C with C99 option..
In the function something goes wrong here!

Code:

suf_tr new_node = (suf_tr)calloc(1,sizeof(struct SUF_TREE));

calloc returns a void *. you don't need to cast when assigning a void * to or from another pointer variable. Also, check the return of calloc for failure.

What do you mean by "something goes wrong"? What goes wrong? How can you tell? Is there an error message? What is it? Did you compile with -g and run it in a debugger? Did you read the FAQ?