[英]problem passing array of struct to a function throwing undefined reference c++
將結構數組傳遞給搜索它們的函數時遇到問題。 我在main外部delcare了一個結構體數組,然后將其復制到main內部的新結構體數組(因此我可以在main內部訪問它們,並且可以更輕松地傳遞它們)。 不知道為什么它會失敗。 誰能幫我?
#include <iostream>
#include <fstream>
#include <iomanip>
#include <string>
#include <algorithm>
using namespace std;
const int MAX = 2000000;
const string DFile = "DFile.dms";
const string EFile = "EFile.dms";
const string VFile = "VFile.dms";
struct dogs
{
int did;
int age;
} DFBuffer[MAX];
struct examine
{
int vid;
int did;
int fee;
} EFBuffer[MAX];
struct vet
{
int vid;
int eLevel;
} VFBuffer[MAX];
void readDF(ifstream&);
void readEF(ifstream&);
void readVF(ifstream&);
int getLineCount(ifstream&);
bool dogCompare(dogs lhs, dogs rhs) {return lhs.did < rhs.did;}
bool vetCompare(vet lhs, vet rhs) {return lhs.vid < rhs.vid;}
bool examCompare(examine lhs, examine rhs) {return lhs.vid < rhs.vid;}
void vetExamSeach(struct vet newVetArray[], struct examine newExamArray[],
int, int);
int main()
{
dogs * newDogArray = new dogs[MAX];
examine * newExamArray = new examine[MAX];
vet * newVetArray = new vet[MAX];
ifstream DF, EF, VF;
int dogCount = 0, examCount = 0, vetCount = 0;
DF.open(DFile);
readDF(DF);
EF.open(EFile);
readEF(EF);
VF.open(VFile);
readVF(VF);
DF.open(DFile);
dogCount = getLineCount(DF);
EF.open(EFile);
examCount = getLineCount(EF);
VF.open(VFile);
vetCount = getLineCount(VF);
for(int i = 0; i < dogCount; i++)
newDogArray[i] = DFBuffer[i];
for(int i = 0; i < vetCount; i++)
newVetArray[i] = VFBuffer[i];
for(int i = 0; i < examCount; i++)
newExamArray[i] = EFBuffer[i];
cout << "Sorting...\n";
sort(newDogArray, newDogArray + dogCount, dogCompare);
sort(newExamArray, newExamArray + examCount, examCompare);
sort(newVetArray, newVetArray + vetCount, vetCompare);
cout << "Sorting complete!\n";
vetExamSeach(newVetArray, newExamArray, vetCount, examCount);
return 0;
}
這是搜索功能。 為了這個問題,我只是想打印我通過的內容。
void search(vet newVetArray[], examine newExamArray[], int vCount, int eCount)
{
for(int i = 1; i < vCount; i++)
cout << "in search: " << newVetArray[i].vid << ' ' << newVetArray[i].eLevel << endl;
}
當我運行您的代碼時,對於readDf,readEF,readVF,getLineCount和vetExamSeach,我得到未定義引用的相同編譯錯誤。 該錯誤是因為沒有這些功能的定義。 只是貼花而已。 當我定義它們(某種隨機的)時,錯誤消失了。 因此,定義函數,錯誤將消失。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.