Code:
#include stdio.h
#define MAXSIZE 5
struct stack
{
int stk[MAXSIZE];
int top;
};
typedef struct stack STACK;
STACK s;
void push(void);
int pop(void);
void display(void);
void main ()
{
int choice;
int option = 1;
s.top = -1;
printf ("STACK OPERATION\n");
while (option)
{
printf ("------------------------------------------\n");
printf (" 1 --> PUSH \n");
printf (" 2 --> POP \n");
printf (" 3 --> DISPLAY \n");
printf (" 4 --> EXIT \n");
printf ("------------------------------------------\n");
printf ("Enter your choice\n");
scanf ("%d", &choice);
switch (choice)
{
case 1:
push();
break;
case 2:
pop();
break;
case 3:
display();
break;
case 4:
return;
}
fflush (stdin);
printf ("Do you want to continue(Type 0 or 1)?\n");
scanf ("%d", &option);
}
}
/* Function to add an element to the stack */
void push ()
{
int num;
if (s.top == (MAXSIZE - 1))
{
printf ("Stack is Full\n");
return;
}
else
{
printf ("Enter the element to be pushed\n");
scanf ("%d", &num);
s.top = s.top + 1;
s.stk[s.top] = num;
}
return;
}
/* Function to delete an element from the stack */
int pop ()
{
int num;
if (s.top == - 1)
{
printf ("Stack is Empty\n");
return (s.top);
}
else
{
num = s.stk[s.top];
printf ("poped element is = %dn", s.stk[s.top]);
s.top = s.top - 1;
}
return(num);
}
/* Function to display the status of the stack */
void display ()
{
int i;
if (s.top == -1)
{
printf ("Stack is empty\n");
return;
}
else
{
printf ("\n The status of the stack is \n");
for (i = s.top; i >= 0; i--)
{
printf ("%d\n", s.stk[i]);
}
}
printf ("\n");
}
Output:
STACK OPERATION
------------------------------------------
1 --> PUSH
2 --> POP
3 --> DISPLAY
4 --> EXIT
------------------------------------------
Enter your choice
1
Enter the element to be pushed
34
Do you want to continue(Type 0 or 1)?
0
$ a.out
STACK OPERATION
------------------------------------------
1 --> PUSH
2 --> POP
3 --> DISPLAY
4 --> EXIT
------------------------------------------
Enter your choice
1
Enter the element to be pushed
34
Do you want to continue(Type 0 or 1)?
1
------------------------------------------
1 --> PUSH
2 --> POP
3 --> DISPLAY
4 --> EXIT
------------------------------------------
Enter your choice
2
poped element is = 34
Do you want to continue(Type 0 or 1)?
1
------------------------------------------
1 --> PUSH
2 --> POP
3 --> DISPLAY
4 --> EXIT
------------------------------------------
Enter your choice
3
Stack is empty
Do you want to continue(Type 0 or 1)?
1
------------------------------------------
1 --> PUSH
2 --> POP
3 --> DISPLAY
4 --> EXIT
------------------------------------------
Enter your choice
1
Enter the element to be pushed
50
Do you want to continue(Type 0 or 1)?
1
------------------------------------------
1 --> PUSH
2 --> POP
3 --> DISPLAY
4 --> EXIT
------------------------------------------
Enter your choice
1
Enter the element to be pushed
60
Do you want to continue(Type 0 or 1)?
1
------------------------------------------
1 --> PUSH
2 --> POP
3 --> DISPLAY
4 --> EXIT
------------------------------------------
Enter your choice
3
The status of the stack is
60
50
Do you want to continue(Type 0 or 1)?
1
------------------------------------------
1 --> PUSH
2 --> POP
3 --> DISPLAY
4 --> EXIT
------------------------------------------
Enter your choice
4
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