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queue.c
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queue.c
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#include <stdio.h>
#define MAX 5
int queue[MAX], front = -1, rear = -1;
void enqueue(){
int item;
printf("\nEnter The Element: ");
scanf("%d", &item);
if (rear == (MAX - 1)){
printf("\nQueue Full!\n");
}
else{
if ((front == -1) && (rear == -1)){
front = rear = 0;
queue[rear] = item;
}
else
queue[++rear] = item;
}
}
void dequeue(){
if (front == - 1)
printf("\nQueue Empty!\n");
else{
printf("\nDeleted Value: %d", queue[front]);
if(front == rear)
front = rear = -1;
else
front++;
}
}
void display(){
if (front == -1)
printf("\nQueue Empty!\n");
else{
printf("\nQueue:\t");
for (int i = front; i <= rear; i++)
printf("%d\t", queue[i]);
}
}
void main(){
int menuFlag = 1;
while (menuFlag == 1){
printf("\n\t\t ============= MENU =============");
printf("\n\t\t 1) Enqueue");
printf("\n\t\t 2) Dequeue");
printf("\n\t\t 3) Display");
printf("\n\t\t 4) Exit");
printf("\n\t\t ================================\n");
int o;
printf("\nEnter Your Option: ");
scanf("%d", &o);
switch(o){
case 1:
enqueue();
break;
case 2:
dequeue();
break;
case 3:
display();
break;
case 4:
printf("\nClosing...\n");
menuFlag = 0;
break;
default:
printf("\nPlease Enter A Valid Option!\n");
}
}
}