Queue using array

#include<stdio.h>
#include<conio.h>
#include<stdbool.h>
#define MAX 10
int array[MAX], front=1, rear=0;

bool isFull(){
    bool isfull;
    if(rear==MAX){
        isfull=true;
    }
    else{
        isfull=false;
    }
    return isfull;
}

bool isEmpty(){
    bool isempty;
    if(front>rear){
        isempty = true;
    }
    else{
        isempty = false;
    }
    return isempty;
}

void insert(int ele){
    if(!isFull()){
        rear++;
        array[rear]=ele;
    }
    else{
        printf("\nCan't insert %d element.\n Queue is full.",ele);
    }
}
void delete(){
    if(!isEmpty()){
        int popped = array[front];
        front++;
        printf("\nElement popped is %d",popped);
    }
    else{
        printf("\nCan't delete element.\n Queue is empty.");
    }
}
void display(){
    for(int i=front;i<=rear;i++){
        printf("\nElement[%d] is %d",i,array[i]);
    }
}
void main(){
    char yn;
    int ch,ele;
    do{
        printf("\n 1: For Push\n 2: For Pop\n 3: For Display\n Your choice:");
        scanf("%d",&ch);
        switch(ch){
            case 1: printf("\nEnter Element you want to push: ");
                    scanf("%d",&ele);
                    insert(ele);
                    break;
            case 2: delete();
                    break;
            case 3: display();
                    break;
            default:printf("\nWrong choice.");
        }
        printf("\n\nDo you want to continue? Enter Y for yes: ");
        scanf(" %c",&yn);

    }while(yn=='Y'||yn=='y');
}