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

/* Write a Program in c  that implement Queue and its operations ( insertion and deletion ) using   linked lists */ #include <stdio.h> #include <stdlib.h> struct node {     int info;     struct node *ptr; }*front,*rear,*temp,*front1; void enq(int data); void deq(); void empty(); int count = 0; void main() {     int no, ch, e;     printf("\n 1 - Enque");     printf("\n 2 - Deque");     printf("\n 3 - Exit");     printf("\n 4 - Display");     while (1)     {         printf("\n Enter choice : ");         scanf("%d", &ch);         switch (ch)         {         case 1:             printf("Enter data : ");             scanf("%d", &no);             enq(no);             break;         case 2:             deq();             break;         case 3:             exit(0);         case 4:             display();             break;         default:             printf("Wrong choice, Please enter corr