Queue program #1
21. Implement Simple Queue using array that performs following operations: INSERT, DELETE, DISPLAY. #include<stdio.h> #define N 50 int q[N]; int f=-1; int r=-1; void enqueue(int y); int dequeue(); void display(); void main() { int ch,x,a; printf ("QUEUE OPERATION\n"); while (1) { printf ("------------------------------------------\n"); printf (" 1 --> INSERT \n"); printf (" 2 --> DELETE \n"); pr...