Which of the following code segment correctly represents to push an element 26 in to the stack, where the initial value of top is -1?a.top+; myStack[top] = 26;b.myStack[top] = 26; top+;c.myStack[top] = 26; top++;d.top++; myStack[top] = 26;
Question
Which of the following code segment correctly represents to push an element 26 in to the stack, where the initial value of top is -1?a.top+; myStack[top] = 26;b.myStack[top] = 26; top+;c.myStack[top] = 26; top++;d.top++; myStack[top] = 26;
Solution
The correct code segment to push an element 26 into the stack, where the initial value of top is -1, is:
d. top++; myStack[top] = 26;
Here's why:
In a stack, the 'top' variable keeps track of the index of the most recently added element. When the stack is empty (i.e., no elements have been added), 'top' is usually set to -1.
When you want to add (or "push") an element onto the stack, you first need to increment 'top' to point to the next available space in the stack. This is done with the 'top++' operation.
After 'top' has been incremented, you can then store the new element at that position in the stack. This is done with the 'myStack[top] = 26' operation.
So, the correct sequence of operations is 'top++', followed by 'myStack[top] = 26'. This corresponds to option d.
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