Queue using Array in C

#include
#include
#define MAX 10

void insert(int);
int del();
int queue[MAX], rear=0, front=0;
void display();
int main()
{
     char ch , a='y';
     int choice, token;
     printf("1.Insert");
     printf("\n2.Delete");
     printf("\n3.show or display");
     do
     {
           printf("\nEnter your choice for the operation: ");
           scanf("%d",&choice);
          switch(choice)
          {
                case 1: insert(token);
                display();
                break;

                case 2:
                token=del();
                printf("\nThe token deleted is %d",token);
                display();
                break;

                case 3:
                display();
                break;

                default:
                printf("Wrong choice");
                break;
          }
          printf("\nDo you want to continue(y/n):");
          ch=getch();
    }
    while(ch=='y'||ch=='Y');
    getch();
}

void display()
{
    int i;
    printf("\nThe queue elements are:");
    for(i=rear;i"%d "

,queue[i]); } } void insert(int token) { char a; if(rear==MAX) { printf("\nQueue full"); return; } do { printf("\nEnter the token to be inserted:"); scanf("%d",&token); queue[front]=token; front=front+1; printf("do you want to continue insertion Y/N"); a=getch(); } while(a=='y'); } int del() { int t; if(front==rear) { printf("\nQueue empty"); return 0; } rear=rear+1; t=queue[rear-1]; return t; }