C++ Primer Plus第四章课后编程

4.12 复习题*
4.13 编程练习*
三句话，希望读者可以先看*

4.12 复习题*

#include<iostream>
#include<vector>
#include<array>
#include<string>
#include<cstring>

//所有头文件为所用复习题+编程练习公用
//1.a

using namespace std;
struct stt1
{char name;
};
int main()
{stt1 actor[30];return 0;
}

//1.b

struct stt2
{short value;
};
int main()
{stt2 betsie[100];return 0;
}

c,d类似
//2.a

int main()
{array<char,30>actor;return 0;
}

//2.b

```bash
```cpp
int main()
{array<short, 100> betsie;return 0;
}*

//3. 4.

int main()
{int whatt1[5] = { 1,3,5,7,9 };std::vector<int>whatt2(5);whatt2[0] = 1; whatt2[1] = 3; whatt2[2] = 5; whatt2[3] = 7; whatt2[4] = 9;std::array<int, 5>whatt3 = { 1,3,5,7,9 };int even = whatt3[0] + whatt3[4];std::cout << even;return 0;
}

*/5.

int main()
{using namespace std;float idea[3]={1,2,3};cout <<idea[1];return 0;
}

*/6.

int main()
{using namespace std;char charr[20]="cheeseburger";cout << charr;return 0;
}

*//7.

int main()
{std::string strr = "Waldofalt";//string必须使用命名空间！！std::cout << strr;return 0;
}

//8. 9.

struct fish_Type
{char name[20];int weight;double length;
};
int main()
{using namespace std;fish_Type firs = {"Tony",26,19.99};cout << "Name : "<<firs.name<<"\nweight : "<<firs.weight<<"\nlength : "<<firs.length;return 0;
}

//*10

int main()
{enum Response { No, Yes, Maybe };std::cout << No;std::cout << Yes;std::cout << Maybe;return 0;
}

//*11

int main()
{double ted=19.99;double* ps = &ted;std::cout << *ps<<" at "<< ps;return 0;
}

//*12.

int main()
{float treacle[10] = {1.01,2.01,3.01,4.01,5.01,6.01,7.01,8.01,9.01,0.01};float* ps = treacle;std::cout << "第一个：" << *ps << " 最后一个：" << *(ps+9);return 0;
}

//13.

int main()
{using namespace std;int a;cout << "输入a: ";cin >> a;int *aa = new int[a];delete[]aa;return 0;
}
***using namespace std访问命名空间的另一种方法***
int main()
{int a;std::cout << "输入a: ";std::cin >> a;std::vector<int>aa(a);std::cout << &aa ;return 0;
}

//*14

int main()
{std::cout << (int *)"wtf";return 0;
}

//*15

struct fish_Type
{char name[20];int weight;double length;
};
int main()
{using namespace std;fish_Type* aa = new fish_Type;*aa = {"Tony",20,19.99};cout << "name is: " << (*aa).name << " weight is:" << aa->weight<<" length is: "<<(*aa).length;delete aa;return 0;
}

//*17

int main()
{const int a = 10;std::vector<std::string>aa(a);getline(std::cin,aa[0]);std::cout<< aa[0];std::array<std::string, a>ab;return 0;
}

4.13 编程练习*

int main()
{using namespace std;cout << "What is your first name? ";const int name_Long = 20;char namef[name_Long];cin.getline(namef,name_Long );cout << "What is your last name? ";string namel;getline(cin,namel);cout << "What do you want? ";char want;//**字符是以数字的形式存储在计算机中的**cin >>want ;cout << "What is your age? ";int age;cin >> age;cout << "Name: " << namef << ", " << namel << endl<< "Grade: "<<char (want+1)<< endl//**输入输出cin cout自动进行字符和数字之间的转换**<< "Age: " << age;return 0;
}

//*2

int main()
{using namespace std;string name, food;cout << "Enter your name: ";getline(cin,name);cout << "What is your favourate food? ";getline(cin,food);cout << "I have some "<<food<<" for "<<name;return 0;
}

//*4

int main()
{using namespace std;char namef[20], namel[20];cout << "Enter your first name: ";cin.get(namef,20);cin.get();//清空缓存cout << "Enter your last name: ";cin.get(namel, 20);cout << "Here is your name: "<<namef<<","<<namel;return 0;
}

//*4

int main()
{using namespace std;string namef, namel,namei,namea;namea = "liyan";namei = ", ";cout << "Enter your first name: ";getline(cin,namef);cout << "Enter your last name: ";getline(cin,namel);cout << "Here is your name: " << namef << "," << namel;return 0;
}

//*5

struct CandyBar
{std::string name;double weight;int kalora;
};
int main()
{using namespace std;CandyBar snack = {"Tony stark",2.3,350};cout << "Name: " << snack.name << endl<< "Weight: " << snack.weight << endl<< "Kalora: "<<snack.kalora<<endl;return 0;
}

//*6

struct CandyBar
{std::string name;double weight;int kalora;
};
int main()
{using namespace std;CandyBar strr[3];strr[0] = {"Tony stack",1.1,130};strr[1] = { "Amy stack",2.1,230 };strr[2] = { "Mark stack",3.1,330 };cout << "Name: " << strr[0].name << endl<< "Weight: " << strr[0].weight << endl<< "Kalora: " << strr[0].kalora << endl;cout << "Name: " << strr[2].name << endl<< "Weight: " << strr[2].weight << endl<< "Kalora: " << strr[2].kalora << endl;return 0;
}

//*7

struct company
{std::string name;int size;double weight;
};
int main()
{using namespace std;company strr[20];cout << "Enter your company name: ";getline(cin, strr[0].name);cout << "Enter your pizz size: ";cin >> strr[0].size;cout << "Enter your pizz weight: ";cin >> strr[0].weight;cout << "Name: " << strr[0].name << endl<< "Size: " << strr[0].size << endl<< "Weight: " << strr[0].weight << endl;return 0;
}

//*8

struct company
{std::string name;int size;double weight;
};
int main()
{using namespace std;company *strr = new company[20];cout << "Enter your pizz size: ";cin >> strr[0].size;cin.get();//cin输入后需要清空缓存cout << "Enter your company name: ";getline(cin, strr[0].name);cout << "Enter your pizz weight: ";cin >> strr[0].weight;cout << "Name: " << strr[0].name << endl<< "Size: " << strr[0].size << endl<< "Weight: " << strr[0].weight << endl;delete[] strr;return 0;
}

//*9

struct CandyBar
{std::string name;double weight;int kalora;
};
int main()
{using namespace std;CandyBar *strr=new CandyBar[3];strr[0] = { "Tony stack",1.1,130 };strr[1] = { "Amy stack",2.1,230 };strr[2] = { "Mark stack",3.1,330 };cout << "Name: " << strr[0].name << endl<< "Weight: " << strr[0].weight << endl<< "Kalora: " << strr[0].kalora << endl;cout << "Name: " << strr[2].name << endl<< "Weight: " << strr[2].weight << endl<< "Kalora: " << strr[2].kalora << endl;delete[]strr;return 0;
}

//*10

int main()
{using namespace std;array<double, 3>grade;cout << "Enter your first grade: ";cin>>grade[0];cout << "Enter your secode grade: ";cin >> grade[1];cout << "Enter your third grade: ";cin >> grade[2];double mean = (grade[0]+ grade[1]+ grade[2])/ 3;cout << "Your meaning grade is: " << mean;return 0;
}

三句话，希望读者可以先看*

代码或有不完善但一定正确可供大家参考，
如有想法欢迎大家来交流沟通

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C++ Primer Plus第四章课后编程

C++ Primer Plus第四章课后编程

4.12 复习题*

4.13 编程练习*

三句话，希望读者可以先看*

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