Code:
#include stdio.h
#include stdlib.h
void push1(int);
void push2(int);
int pop1();
int pop2();
void enqueue();
void dequeue();
void display();
void create();
int st1[100], st2[100];
int top1 = -1, top2 = -1;
int count = 0;
void main()
{
int ch;
printf("\n1 - Enqueue element into queue");
printf("\n2 - Dequeu element from queue");
printf("\n3 - Display from queue");
printf("\n4 - Exit");
create();
while (1)
{
printf("\nEnter choice");
scanf("%d", &ch);
switch (ch)
{
case 1:
enqueue();
break;
case 2:
dequeue();
break;
case 3:
display();
break;
case 4:
exit(0);
default:
printf("Wrong choice");
}
}
}
/*Function to create a queue*/
void create()
{
top1 = top2 = -1;
}
/*Function to push the element on to the stack*/
void push1(int data)
{
st1[++top1] = data;
}
/*Function to pop the element from the stack*/
int pop1()
{
return(st1[top1--]);
}
/*Function to push an element on to stack*/
void push2(int data)
{
st2[++top2] = data;
}
/*Function to pop an element from th stack*/
int pop2()
{
return(st2[top2--]);
}
/*Function to add an element into the queue using stack*/
void enqueue()
{
int data, i;
printf("Enter data into queue");
scanf("%d", &data);
push1(data);
count++;
}
/*Function to delete an element from the queue using stack*/
void dequeue()
{
int i;
for (i = 0;i <= count;i++)
{
push2(pop1());
}
pop2();
count--;
for (i = 0;i <= count;i++)
{
push1(pop2());
}
}
/*Function to display the elements in the stack*/
void display()
{
int i;
for (i = 0;i <= top1;i++)
{
printf(" %d ", st1[i]);
}
}
Output:
1 - Enqueue element into queue
2 - Dequeu element from queue
3 - Display from queue
4 - Exit
Enter choice1
Enter data into queue10
Enter choice1
Enter data into queue20
Enter choice1
Enter data into queue30
Enter choice1
Enter data into queue40
Enter choice3
10 20 30 40
Enter choice2
Enter choice3
20 30 40
Enter choice4
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