這裏是我的代碼:收到錯誤消息說變量沒有被宣佈時,它具有
struct data {
char carReg[6];
char make[20], model[20], colour[20];
int numPrevOwners;
bool reserved;
float reserveAmount;
};
struct node {
struct data *element;
struct node *next;
};
而且在我的主要方法,我有這樣的:
struct node *current, *aNode;
struct data *anElement, *newCar;
FILE *file;
file = fopen("d:car.dat", "r"); //open the file for reading
if (file == NULL) {
printf("Nothing found in this file.\n\n");
printf("\n");
}//end if
else {
//If it does exist, cars in file should be copied into the linked list
while(fread(&newCar, sizeof(struct data), 1, file)>0) {
aNode = (struct node *)malloc(sizeof(struct node));
anElement = (struct data *)malloc(sizeof(struct data));
strcpy(anElement->carReg ,newCar->carReg);
strcpy(anElement->make, newCar->make);
strcpy(anElement->model, newCar->model);
strcpy(anElement->colour, newCar->colour);
anElement->numPrevOwners = newCar->numPrevOwners;
anElement->reserved = newCar->reserved;
anElement->reserveAmount = newCar->reserveAmount;
if (aNode == NULL)
printf("Error - no space for the new node\n");
else { // add data part to the node
aNode->element = anElement;
aNode->next = NULL;
if (isEmpty())
{
front = aNode;
last = aNode;
}
else {
last->next = aNode;
last = aNode;
}
}
}//end while
printf("Cars in the system");
}//end else
錯誤消息我m得到是'carReg'尚未申報,'make'尚未申報等。
任何人都可以幫忙嗎?
編輯 - 我有它更新,它都編譯,但程序不運行。它運行但說title.exe已停止運行。
你需要所有指針代替'''',而不是''',而不僅僅是其中的一些 – deviantfan
'newCar'不應該是一個指針。目前你的代碼並沒有保存'aNode'或'anElement'中的任何指針。 – ooga
@ooga我上面編輯了我的評論。它編譯但不能正常運行。 – jf95