我正在處理一個必須通過所有功能 參數指針的分配。除全局常量外,不允許使用全局變量。通過數組和指針訪問衝突
我要在main中創建一個「出價」數組,並用readBids()函數填充它。這有效,但我應該把它傳遞給一個函數來對其進行冒泡排序。一旦我的sortBids函數被調用,我的程序就會中斷。我現在正在學習指針,我看不出我做錯了什麼。 Call Stack給出Project4.exe!main()Line32
,其指向sortBids(bidArray, numBids);
任何幫助和解釋將不勝感激。
#include <iostream>
#include <string>
using namespace std;
string* readProductName();
int* readNumBids();
double* readBids(string,int);
void sortBids(double*, int*);
void averageBid();
void maxBid();
void totalBid();
void printReport();
int main(){
string* productName;
int* numBids;
productName = readProductName();
numBids = readNumBids();
double* bidArray = readBids(*productName, *numBids);
sortBids(bidArray, numBids);
cout << *productName << " " << *numBids << endl;
for (int i = 0; i < *numBids; i++){
cout << bidArray[i] << endl;
}
system("PAUSE");
delete productName;
delete numBids;
delete bidArray;
return 0;
}
string* readProductName(){
string* productName = new string;
cout << "\n Please enter a product name\n";
cin >> *productName;
return productName;
}
int* readNumBids(){
int* numBids = new int;
cout << "\n Please enter the number of bids\n";
cin >> *numBids;
return numBids;
}
double* readBids(string productName, int numBids){
int* size = new int;
size = &numBids;
string* productNamePtr = new string;
productNamePtr = &productName;
double *bidArray;
bidArray = new double[*size];
cout << "\nHow many bids for the " << *productNamePtr << endl;
for (int i = 0; i < *size; i++){
cout << "Please enter bid #" << i + 1 << endl;
cin >> bidArray[i];
if (bidArray[i] <= 0){
cout << "\nPlease enter an amount larger than 0\n";
i--;
}
}
return bidArray;
}
void sortBids(double* array, int *size){
bool* swap = bool{ false };
double* temp = new double;
do
{
*swap = false;
for (int count = 0; count < *size - 1; count++)
{
if (array[count] > array[count + 1])
{
*temp = array[count];
array[count] = array[count + 1];
array[count + 1] = *temp;
*swap = true;
}
}
} while (*swap);
}
你已經看到太多的Java和太少的C++。 '新的雙';而這就是瘋狂。 – LogicStuff
這很有可能 – sircrisp
**必須通過所有函數參數的指針**爲什麼在地球上? – SergeyA