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reverse-stack.c
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reverse-stack.c
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// Program to reverse the elements of a stack using additional stack
#include <stdio.h>
#include <stdlib.h>
int top = -1;
void push(int arr[], int n)
{
if (top == n - 1)
printf("Stack overflow!");
else
{
top++;
printf("Enter data: ");
scanf("%d", &arr[top]);
}
}
void display(int arr[])
{
if (top == -1)
printf("Stack underflow");
else
{
printf("The elements of the stack are: ");
printf("\n---\n");
for (int i = top; i >= 0; i--)
printf(" %d\n---\n", arr[i]);
}
}
void reverse(int arr[], int revA[])
{
if (top == -1)
printf("Stack underflow");
else
{
int j = 0;
for (int i = top; i >= 0; i--)
{
revA[j] = arr[i];
j++;
}
}
}
int main()
{
int n, i, arr[100], revA[100];
printf("Enter the size of stack: ");
scanf("%d", &n);
for (i = 0; i < n; i++)
push(arr, n);
display(arr);
reverse(arr, revA);
printf("\nAfter reversing stack: ");
display(revA);
}
// Output:
/*
Enter the size of stack: 5
Enter data: 1
Enter data: 2
Enter data: 3
Enter data: 4
Enter data: 5
The elements of the stack are:
---
5
---
4
---
3
---
2
---
1
---
After reversing stack: The elements of the stack are:
---
1
---
2
---
3
---
4
---
5
---
*/