首先是我的代码 http://ideone.com/qckStZ
#include<stdio.h>
#include<cstring>
#include<utility>
using namespace std;
#define nameLength 50
// all 'Rate' attribute appear to be in '%' unit
//exaple: fatRate=70 which mean fatRate is 70%
class ingredient
{
private:
friend class mix_ingredient;
char* name;
unsigned weigh;
unsigned fatWeigh;
unsigned glutenWeigh;
unsigned condenceRate;
public:
virtual unsigned getWeigh() { return weigh; }
virtual unsigned getFatWeigh() { return fatWeigh; }
virtual unsigned getGlutenWeigh() { return glutenWeigh; }
virtual unsigned getCondenceRate() { return condenceRate; }
public:
//virtual void ini() = 0;
public:
ingredient() { name = new char[nameLength]; }
ingredient(const ingredient& x) :name(new char[nameLength])
{
strcpy(name, x.name);
weigh = x.weigh;
fatWeigh = x.fatWeigh;
glutenWeigh = x.glutenWeigh;
condenceRate = x.condenceRate;
}
ingredient(ingredient&& x)noexcept: name(new char[nameLength])
{
strcpy(name, x.name);
weigh = x.weigh;
fatWeigh = x.fatWeigh;
glutenWeigh = x.glutenWeigh;
condenceRate = x.condenceRate;
x.name = NULL;
}
virtual ingredient& operator=(const ingredient& x)
{
ingredient tmp(x);
*this = std::move(tmp);
return *this;
}
ingredient& operator=(ingredient&& x)noexcept
{
name = x.name;
x.name = NULL;
weigh = x.weigh;
fatWeigh = x.fatWeigh;
glutenWeigh = x.glutenWeigh;
condenceRate = x.condenceRate;
return *this;
}
~ingredient()
{
delete[] name;
}
};
typedef class raw_ingredient: public ingredient
{
private:
char* name;
unsigned weigh;
unsigned fatRate;
unsigned glutenRate;
unsigned condenceRate;
public:
virtual unsigned getFatWeigh() { return fatRate*(weigh * 5)*condenceRate / 1000000; }
virtual unsigned getGlutenWeigh() { return glutenRate*weigh * 30 / 10000; }
virtual unsigned getWeigh() { return weigh; }
virtual unsigned getFatRate() { return fatRate; }
virtual unsigned getGlutenRate() { return glutenRate; }
virtual unsigned getCondenceRate() { return condenceRate; }
public:
public:
raw_ingredient() { name = new char[nameLength]; }
raw_ingredient(const char* name, unsigned w, unsigned fR, unsigned gR, unsigned cR)
{
this->name = new char[nameLength];
strcpy(this->name, name);
weigh = w;
fatRate = fR;
glutenRate = gR;
condenceRate = cR;
}
raw_ingredient(const raw_ingredient& x) :name(new char[nameLength])
{
strcpy(name, x.name);
weigh = x.weigh;
fatRate = x.fatRate;
glutenRate = x.glutenRate;
condenceRate = x.condenceRate;
}
raw_ingredient(raw_ingredient&& x)noexcept: name(new char[nameLength])
{
strcpy(name, x.name);
weigh = x.weigh;
fatRate = x.fatRate;
glutenRate = x.glutenRate;
condenceRate = x.condenceRate;
x.name = NULL;
}
virtual raw_ingredient& operator=(const raw_ingredient& x)
{
raw_ingredient tmp(x);
*this = std::move(tmp);
return *this;
}
raw_ingredient& operator=(raw_ingredient&& x)noexcept
{
name = x.name;
x.name = NULL;
weigh = x.weigh;
fatRate = x.fatRate;
glutenRate = x.glutenRate;
condenceRate = x.condenceRate;
return *this;
}
~raw_ingredient()
{
delete[] name;
}
}raw;
typedef class mix_ingredient: public ingredient
{
private:
ingredient** ingre;
unsigned n = 0;//Number of ingredient // 0 mean empty
public:
void ini();
int put(ingredient* x);
public:
virtual unsigned getWeigh() { return weigh; }
virtual unsigned getFatWeigh() { return fatWeigh; }
virtual unsigned getGlutenWeigh() { return glutenWeigh; }
virtual unsigned getCondenceRate() { return condenceRate; }
public:
mix_ingredient(int n) { ingre = new ingredient*[n]; this->n = n; }
mix_ingredient(ingredient* x) : ingre(new ingredient*), n(1)
{
ingre = &x;
}
mix_ingredient(const mix_ingredient& x) :ingre(new ingredient*[n])
{
for (int i = 0;i < n;i++)
ingre[i] = x.ingre[i];
weigh = x.weigh;
fatWeigh = x.fatWeigh;
glutenWeigh = x.glutenWeigh;
condenceRate = x.condenceRate;
}
mix_ingredient(mix_ingredient&& x)noexcept: ingre(new ingredient*[n])
{
for (int i = 0;i < n;i++)
ingre[i] = x.ingre[i];
weigh = x.weigh;
fatWeigh = x.fatWeigh;
glutenWeigh = x.glutenWeigh;
condenceRate = x.condenceRate;
x.ingre = NULL;
}
virtual mix_ingredient& operator=(const mix_ingredient& x)
{
mix_ingredient tmp(x);
*this = std::move(tmp);
return *this;
}
mix_ingredient& operator=(mix_ingredient&& x)noexcept
{
ingre = x.ingre;
x.ingre = NULL;
weigh = x.weigh;
fatWeigh = x.fatWeigh;
glutenWeigh = x.glutenWeigh;
condenceRate = x.condenceRate;
return *this;
}
~mix_ingredient()
{
delete[] ingre;
}
}mix;
void mix_ingredient::ini()
{
weigh = 0;
for (int i = 0;i < n;i++)
weigh += ingre[i]->getWeigh();
fatWeigh = 0;
for (int i = 0;i < n;i++)
if (ingre[i]->getWeigh() > 50)
fatWeigh += ingre[i]->getFatWeigh();
glutenWeigh = 0;
for (int i = 0;i < n;i++)
if (ingre[i]->getCondenceRate() < 60)
glutenWeigh += ingre[i]->getGlutenWeigh();
unsigned tmp = 0;
for (int i = 0;i < n;i++)
tmp = ingre[i]->getWeigh()*ingre[i]->getCondenceRate();
condenceRate = tmp / weigh;
}
int mix_ingredient::put(ingredient * x)
{
for (int i = 0;i < n;i++)
if (ingre[i] == NULL)
{
ingre[i] = x;
return 1;
}
return 0;
}
class cake
{
private:
char* name;
ingredient** ingre;
int n;
unsigned weigh;
unsigned fatWeigh;
unsigned glutenWeigh;
unsigned condenceRate;
public:
unsigned getWeigh() { return weigh; }
unsigned getFatWeigh() { return fatWeigh; }
unsigned getGlutenWeigh() { return glutenWeigh; }
unsigned getCondenceRate() { return condenceRate; }
public:
cake(const char* name, int n)
{
this->name = new char[nameLength];
strcpy(this->name, name);
this->ingre = new ingredient*[n];
this->n = n;
}
int put(ingredient* x)
{
for (int i = 0;i < n;i++)
if (ingre[i] == NULL)
{
ingre[i] = x;
return 1;
}
return 0;
}
void ini();
void print();
public:
cake() { name = new char[nameLength]; }
cake(const cake& x) :name(new char[nameLength])
{
strcpy(name, x.name);
ingre = new ingredient*(*(x.ingre));
}
cake(cake&& x)noexcept: name(new char[nameLength])
{
strcpy(name, x.name);
x.name = NULL;
ingre = x.ingre;
x.ingre = NULL;
}
cake& operator=(const cake& x)
{
cake tmp(x);
*this = std::move(tmp);
return *this;
}
cake& operator=(cake&& x)noexcept
{
name = x.name;
x.name = NULL;
ingre = x.ingre;
x.ingre = NULL;
}
~cake()
{
delete[] name;
delete ingre;
}
};
void cake::ini()
{
weigh = 0;
for (int i = 0;i < n;i++)
weigh += ingre[i]->getWeigh();
fatWeigh = 0;
for (int i = 0;i < n;i++)
if (ingre[i]->getWeigh() > 50)
fatWeigh += ingre[i]->getFatWeigh();
glutenWeigh = 0;
for (int i = 0;i < n;i++)
if (ingre[i]->getCondenceRate() < 60)
glutenWeigh += ingre[i]->getGlutenWeigh();
unsigned tmp = 0;
for (int i = 0;i < n;i++)
tmp = ingre[i]->getWeigh()*ingre[i]->getCondenceRate();
condenceRate = tmp / weigh;
}
void cake::print()
{
printf("%s", name);
}
int main()
{
//Nguyên liệu nguyên chất
//1
raw powder("Bot my",100,0,76,100);
//2
raw egg("Trung", 100, 4, 1, 60);
//3
raw milk("Sua", 100, 1, 5, 100);
//4
raw gelatin("Gelatin", 100, 0, 14, 25);
//5
raw cream("Kem tuoi", 100, 8, 14, 70);
//6
raw creamCheese("Pho mai kem", 100, 11, 4, 70);
//7
raw sugar("Duong", 100, 0, 100, 100);
//8
raw cornPowder("Bot ngo", 100, 0, 79, 100);
//9
raw water("Nuoc", 100, 0, 0, 0);
//10
raw caramen("Caramen", 100, 1, 23, 90);
//11
raw flour("Bot nep", 100, 0, 21, 100);
//12
raw salt("Muoi", 100, 0, 0, 100);
//13
raw bakingPowder("Bot no", 100, 0, 28, 100);
//Nguyên liệu hỗn hợp
mix cakeMixture(4);
cakeMixture.put(&powder);
cakeMixture.put(&egg);
cakeMixture.put(&milk);
cakeMixture.put(&water);
cakeMixture.ini();
mix ladyFinger(5);
ladyFinger.put(&powder);
ladyFinger.put(&egg);
ladyFinger.put(&sugar);
ladyFinger.put(&cornPowder);
ladyFinger.put(&salt);
ladyFinger.ini();
mix mochiMixture(3);
mochiMixture.put(&sugar);
mochiMixture.put(&water);
mochiMixture.put(&caramen);
mochiMixture.ini();
mix mousseMixture(2);
mousseMixture.put(&gelatin);
mousseMixture.put(&cream);
mousseMixture.ini();
//Bánh
cake pancake("Pancake",1);
pancake.put(&cakeMixture);
pancake.ini();
cake mousse("Mousse", 1);
mousse.put(&mousseMixture);
mousse.ini();
cake cheesecake("Banh pho mai", 2);
cheesecake.put(&cream);
cheesecake.put(&creamCheese);
cheesecake.ini();
cake tiramisu("Tiramisu", 1);
tiramisu.put(&cream);
tiramisu.ini();
cake cupcake("Cupcake", 1);
cupcake.put(&cakeMixture);
cupcake.ini();
cake muffin("Muffin", 1);
muffin.put(&cakeMixture);
muffin.ini();
cake mochi("Mochi", 1);
mochi.put(&mochiMixture);
mochi.ini();
cake flan("Flan", 2);
flan.put(&cakeMixture);
flan.put(&caramen);
flan.ini();
cake gato("Gato", 1);
gato.put(&cakeMixture);
gato.ini();
cake donut("Donut", 2);
donut.put(&powder);
donut.put(&bakingPowder);
donut.ini();
cake bakery[] = { pancake,mousse,cheesecake,tiramisu,cupcake,muffin,mochi,flan,gato,donut };
for (int i = 0;i < 10;i++)
{
bakery[i].print();
printf("\n");
}
printf("Cac loai banh mem: \n");
for (int i = 0;i < 10;i++)
{
if (bakery[i].getCondenceRate() < 20)
bakery[i].print();
printf("\n");
}
printf("Banh ngot va it beo: \n");
for (int i = 0;i < 10;i++)
{
if (bakery[i].getGlutenWeigh()*100/bakery[i].getWeigh() >40 &&
bakery[i].getFatWeigh() * 100 / bakery[i].getWeigh() <50)
bakery[i].print();
printf("\n");
}
return 0;
}
网站似乎正确地运行了我的代码，但是当我尝试使用我的VS2015社区时，它会返回“访问冲突读取位置”并在第196行中断。 我不知道为什么以及如何解决这个问题。我已经阅读了一些类似的问题，这些问题已经在堆栈溢出上发布但是找到了解决这个问题的好方法。所以，请保存我的一天！ 真诚的，谢谢。
P / s：对于冒犯和语法不正确的事感到抱歉。
答案 0 :(得分：3)
在mix_ingredient的构造函数中，您创建了一个指针数组ingre = new ingredient*[n]，但是您没有使用值初始化数组。
稍后在mix_ingredient::put中，检查这些值是否不是NULL。如果ingre中的数组值未初始化，则可能存在任何内容。它不必是NULL，如果用作地址，它很可能不会指向您的程序允许使用的任何地址空间。
稍后在mix_ingredient::ini中，您使用inge中的值，就像它指向对象ingredient一样，如果地址未指向有效对象，则会导致访问冲突。