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Question :

Define and explain ?push? and ?pop??

Category Data Structure Interview Questions
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Added on 9/14/2014
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Question :

Define and explain ?push? and ?pop??


Answer:

The insertion operation is referred to as ?push? and the deletion operation is referred to as ?pop?. Since, insertion and deletion operations are performed at one end of the stack; the elements can only be removed in the opposite order from that in which they were added to the stack. This phenomenon is observed in conjunction with recursive functions.
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#define MAX 10;
struct stack
{
int top;
int item[MAX];
};
typedef struct stack st;
void push(st *s,int x)
{
if(s->top==MAX-1)
{
printf("stack is overflow");
}
else
{
s->top++;
s->item[s->top]=x;
}
}

int pop(st *s)
{
if(s->top==MAX-1)
{
printf(stack is under flow");
}
else
{
return s->item[s->top--];
}
}
Source: CoolInterview.com



Posted by: ansar husain rkgit

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Plase correct in the pop function. The condition s->top==MAX-1 should be raplaced with s->top==0.
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Posted by: jayaram

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