我寫了一個小程序,它接受用戶輸入並創建鏈接列表。我在構建時遇到了一個錯誤,這似乎與HeadPointer傳遞到打印函數有關。錯誤如下:未定義對鏈接列表的引用打印功能
undefined reference to `PrintList(PetData*)'|
||=== Build failed: 1 error(s), 0 warning(s) (0 minute(s), 0 second(s)) ===|
如果任何人都可以點(PUT並非意)我在正確的方向,甚至明確地給我修復我真的很感激它。 源代碼:
#include <iomanip>
#include <string>
#include <iostream>
using namespace std;
struct PetData{
int IdNumber;
string PetType;
PetData *link;
};
PetData * HeadPointer=NULL;
void InsertItem(int, string, PetData*);
void PrintList(PetData*);
int main(){
int init_IdNumber;
string init_PetType;
PetData * CRP = NULL;
char cflag = 'Y';
while (toupper(cflag) == 'Y'){
cout << "Please Enter an ID Number: " << endl;
cin >> init_IdNumber;
cout << "Please Enter a Pet Type: " << endl;
cin >> init_PetType;
CRP = new PetData;
InsertItem(init_IdNumber,init_PetType,CRP);
HeadPointer=CRP;
cout << "Would you like to enter another? (Y/N)" << endl;
cin >> cflag;
};
PrintList(HeadPointer);
return 1;
};
void InsertItem(int init_IdNumber, string init_PetType, PetData* CRP){
CRP->PetType = init_PetType;
CRP->IdNumber = init_IdNumber;
CRP->link = HeadPointer;
};
void PrintList(){
while(HeadPointer != NULL){
cout << HeadPointer->PetType << "\t" << HeadPointer->IdNumber << endl;
HeadPointer = HeadPointer->link;
}
};
在任何人提起這件事,這不是一個家庭作業。這是我的教授建議我們獨立創建的,爲未來的中期任務做準備。
謝謝!
爲什麼全局變量?那是你教的嗎? –