noob在這里的問題：我正在嘗試編寫一個簡單的菜單界面，但是我一直遇到分段錯誤錯誤，我不知道為什么。#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;在任何菜單選項中輸入兩個字段后，出現(xiàn)分段錯誤