noob question here: I'm trying to write a simple menu interface, but I keep getting a segmentation fault error and I can't figure out why.

#include <stdlib.h>
#include <stdio.h>
int flush(); int add(char *name, char *password, char *type); int delete(char *name);
int edit(char *name, char *password, char *type, char *newName, char *newPassword, char            *newType);
int verify(char *name, char *password);



int menu(){
    int input;
    char *name, *password, *type, *newName, *newPassword, *newType;
    printf("MAIN MENU \n ============\n");
    printf("1. ADD\n");
    printf("2. DELETE\n");
    printf("3. EDIT\n");
    printf("4. VERIFY\n");
    printf("5. Exit\n");
    printf("Selection:");
    scanf("%d", &input);
    flush();
    switch (input){

    case 1:
        printf("%s\n", "Enter Name:");
        scanf("%s", name);
        flush();
        printf("%s\n", "enter password" );
        scanf("%s", password);
        flush();
        printf("%s\n","enter type" );
        scanf("%s",type);
        add(name, password, type);
        menu();
        break;
    case 2:
        printf("Enter Name:" );
        scanf("%s",name);
        flush();
        delete(name);
        menu();
        break;
    case 3:
        printf("Enter Name:\n");
        scanf("%s",name);
        flush();
        printf("Enter Password\n");
        scanf("%s", password);
        flush();            
        printf("enter type:\n");
        scanf("%s", type);
        flush();
        printf("enter your new username:\n");
        scanf("%s",newName);
        flush();
        printf("enter your new password\n");
        scanf("%s", newPassword);
        flush();
        printf("enter your new type\n");
        scanf("%s",newType);
        flush();
        edit(name, password, type, newName, newPassword, newType);
        menu();
        break;
    case 4:
        printf("Enter Name\n");
        scanf("%s",name);
        flush();
        printf("Enter Password\n");
        scanf("%s",password);
        flush();
        verify(name, password);
        menu();
        break;
    case 5:
        return 0;
    default:
        printf("invalid input, please select from the following:\n");
        menu();
}
    return 0;
    }

    int flush(){
     int ch;
     while ((ch = getchar()) != EOF && ch != '\n') ;
     return 0;
    }

I get the segmentation fault after entering two fields, in any menu option