Programming

spos is getting some large number at the initialisation line(int spos=0) itself..How do this occur?How can i avoid this?

Are you sure? It's getting assigned a value one or two less than top a few lines later, and it's not at all clear where the value of top is coming from.

Post the definition of the stack_rec structure...what is its size?
What platform are you on and what are the ulimits for stack and data?

As an aside, proper architecting would dictate that you should write and debug a separate stack abstraction and access it only through a well-defined interface, rather than inline nitty-gritty stack handling into the main application logic. In the several days you have been struggling with this problem, I'm guessing you could have ripped out the stack operations and replaced them with a standard stack implementation (I hear the BOOST library has stuff like that for you).

Definition of stack_rec:

struct stack_rec {
int word_cat;
int phrase;
char word[60];
char mal[60];
char E_attr[60];
char H_attr[10];
char semantic_tag[60];
char connectors[3][16];
int cntrs_cnt;
int resolved;
int adj;
int adj_count;
};
allocated size 100 ..working in C. ulimit for stack is 10240

Can you add debugging printf statements to the code to see the value of top when the problematic function is entered, and perhaps elsewhere in the code where this value is modified?

On my system size of the stack_rec structure is 324 bytes...not sure where you are getting an allocated size of 100 and stack size of 10240 I'm assuming it's in kilobytes??