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我想學習指針,我得到這個錯誤。我是否需要更改頭文件類Request?爲什麼我會收到這樣的錯誤?類型錯誤和指針混淆
cannot convert `req' from type `Request' to type `Request *'
錯誤是發生在論文線:
//Store necessary information in a Request object for each request.
Request req(url, request, 1);
Request *reqq = req; //req points to the object
list->Append(reqq);
代碼:
void
ClientThread(int request)
{
const int sz = 50;
char url[sz];
FILE *fp = fopen("url.txt", "r");
if (!fp)
printf(" Cannot open file url.txt!\n");
else {
int pos = 0;
char c = getc(fp);
while (c != EOF || pos == sz - 1) {
if (c == '\n') {
url[pos] = '\0';
serve(url);
pos = 0;
//Store necessary information in a Request object for each request.
Request req(url, request, 1);
Request *reqq = req; //req points to the object
list->Append(reqq);
}
else {
url[pos++] = c;
}
c = getc(fp);
}
fclose(fp);
}
}
我request.h文件包括以下內容:
class Request
{
public:
//constructor intializes request type
Request(char *u, int rqtID, int rqtrID);
char *url;
int requestID;
int requesterID;
}
'req'是'Request'。 'reqq'是一個指向'Request'的指針。從一個到另一個沒有轉換。 – juanchopanza 2014-09-25 21:56:00
運算符'&'的地址用於將對象轉換爲指針:'&req'。 – 2014-09-25 21:56:10
@MarkRansom:'&'操作符不會將*對象轉換爲指針。它會產生一個指向對象地址的指針值。 – 2014-09-25 22:09:32