Switch statement "Process finished with exit code 11"

Hello,

My program works fine, but if I choose case 1, enter a name, choose case 0, then choose case 1 again i get "Process finished with exit code 11". Not sure why but if anyone could help thatd be much appreciated!

Thanks,

-Nick

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

typedef struct list{
    char name; //info in node
    struct list *link;
}node;
node *getnode();


int main() {
    char ch;
    int temp = 1;

    //creating node
    node *a = getnode();
    a -> link = NULL;

    while (temp == 1) {
        printf("\n0. Call a customer");
        printf("\n1. Add a customer");
        printf("\n2. Quit");
        printf("\nPlease input your command (0-2): ");
        scanf("%d", &ch);

        switch (ch){
            case 0:
                if(a != NULL) {
                    while(a != NULL) {
                        printf("\nCustomer name: %s", &a->name);
                        a = a->link;
                        break;
                    }
                }
                else
                {
                    printf("\n-->WARNING: there are currently no customers in line<--");
                }

                break;

            case 1:
                printf("\nEnter the name of the customer here:\n ");
                scanf("%s", &a -> name);
                continue;


            case 2: temp = 0;
                printf("\n...EXITING PROGRAM...");
                break;
        }

    }
    return 0;
}

node *getnode(){
    return (node *)malloc(sizeof(node));
}