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Write a Program in c that implement Queue and its operations ( insertion and deletion ) using arrays

/* Write a Program in c that implement Queue and its operations ( insertion and deletion ) using   arrays*/   #include <stdio.h> #define MAX 50 void insert(); void delete(); void display(); int queue_array[MAX]; int rear = - 1; int front = - 1; main() {     int choice;     while (1)     {         printf("\n 1.Insert element to queue \n");         printf("\n 2.Delete element from queue \n");         printf("\n 3.Display all elements of queue \n");         printf("\n 4.Quit \n");         printf("\n Enter your choice : \n");         scanf("%d", &choice);         switch (choice)         {          ...