4-13编程练习解答

 1 /* Author : grey_qisen */
 2 // 4-13_1.cpp
 3 #include<iostream> 
 4 const int Size = 20;
 5 
 6 int main(){
 7     using namespace std;
 8     char firstName[Size];    char lastName[Size];
 9     char deserveGrade;    char trueGrade;
10     int age;
11     
12     cout << "What is your first name? ";
13     cin.getline(firstName,Size);
14     cout << "What is your last name? ";
15     cin.getline(lastName,Size);
16     cout << "What letter grade do you deserve? ";
17     cin  >> deserveGrade;
18     cout << "What is your age? ";
19     cin  >> age;
20     
21     if(deserveGrade == 68)    deserveGrade = 69;
22     if(deserveGrade == 70)    deserveGrade = 69;
23     trueGrade = deserveGrade + 1;
24     
25     cout << "Name:" << lastName << ", " << firstName << endl;
26     cout << "Grade: " << trueGrade << endl;
27     cout << "Age: " << age << endl;
28     
29     return 0;
30 }

 1 /* Author : grey_qisen */
 2 // 4-13_2.cpp
 3 #include<iostream>
 4 #include<string>
 5 #include<cstring>
 6 
 7 int main(){
 8     using namespace std;
 9     string name;    string dessert;
10     cout << "Enter your name:\n";
11     getline(cin,name);
12     cout << "Enter your favorite dessert:\n";
13     getline(cin,dessert);
14     cout << "I have some delicious " << dessert;
15     cout << " for you, " << name << ".\n"; 
16     
17     return 0;
18 }

 1 /* Author : grey_qisen */
 2 // 4-13_3.cpp
 3 #include<iostream>
 4 #include<cstring>
 5 const int MaxSize = 20;
 6 
 7 int main(){
 8     using namespace std;
 9     char firstName[MaxSize];    char lastName[MaxSize];
10     cout << "Enter your first name: ";
11     cin  >> firstName;
12     cout << "Enter your last name: ";
13     cin  >> lastName;
14     
15     strcat(lastName,", ");
16     strcat(lastName,firstName);
17     cout << "Here‘s the information in a single string: " << lastName << endl;
18 
19     return 0;
20 }

 1 /* Author : grey_qisen */
 2 // 4-13_4.cpp
 3 #include<iostream>
 4 #include<string>
 5 #include<cstring>
 6 
 7 int main(){
 8     using namespace std;
 9     string firstName;    string lastName;
10     cout << "Enter your first name: ";
11     cin  >> firstName;
12     cout << "Enter your last name: ";
13     cin  >> lastName;
14     
15     lastName += ", ";
16     lastName += firstName;
17     cout << "Here‘s the information in a single string: " << lastName << endl;
18     
19     return 0;
20 }

 1 /* Author : grey_qisen */
 2 // 4-13_5.cpp
 3 #include<iostream>
 4 const int MaxSize = 20;
 5 struct CandyBar{
 6     char name[20];        // the name of candy
 7     double weight;            // the weight of candy
 8     int Kaluli;                // the kaluli of candy 
 9 };
10 
11 int main(){
12     using namespace std;
13     CandyBar snack = {
14         "Mocha Munch",
15         2.3,
16         350
17     };
18     
19     cout << "The information of candy is :\n";
20     cout << "candy name: " << snack.name << endl
21          << "candy weight: " << snack.weight << endl
22          << "candy Kaluli: " << snack.Kaluli << endl;
23     
24     return 0;
25 }

 1 /* Author : grey_qisen */
 2 // 4-13_6.cpp
 3 #include<iostream>
 4 const int MaxSize = 20;
 5 struct CandyBar{
 6     char name[20];        // the name of candy
 7     double weight;            // the weight of candy
 8     int Kaluli;                // the kaluli of candy 
 9 };
10 
11 int main(){
12     using namespace std;
13     CandyBar candy[3] = {
14          {"MM_1", 2.0, 200},
15          {"MM_2", 1.1, 250},
16          {"MM_3", 2.2, 300}
17     };
18 
19     cout << "The information of candy is :\n";
20     cout << "first candy name is: " << candy[0].name << endl
21          << "first candy weight is " << candy[0].weight << endl
22          << "first candy Kaluli is " << candy[0].Kaluli << endl;
23          
24     cout << "second candy name is: " << candy[1].name << endl
25          << "second candy weight is " << candy[1].weight << endl
26          << "second candy Kaluli is " << candy[1].Kaluli << endl;
27 
28     cout << "third candy name is: " << candy[2].name << endl
29          << "third candy weight is " << candy[2].weight << endl
30          << "third candy Kaluli is " << candy[2].Kaluli << endl;                  
31          
32     return 0;
33 }

 1 /* Author : grey_qisen */
 2 // 4-13_7.cpp
 3 #include<iostream>
 4 const int MaxSize = 20;
 5 struct Pizza{
 6     char pizzaName[MaxSize];
 7     int  pizzaDiam;
 8     double pizzaWeight;
 9 };
10 
11 int main(){
12     using namespace std;
13     Pizza WWpizza = {};
14     cout << "Enter the pizza‘s name: ";
15     cin.getline(WWpizza.pizzaName,MaxSize);
16     cout << "Enter the diam of pizza: ";
17     cin  >> WWpizza.pizzaDiam;
18     cout << "Enter the weight of pizza: ";
19     cin  >> WWpizza.pizzaWeight;
20     
21     cout << "Your pizza‘s information is:" << endl;
22     cout << "Pizza‘s name: " << WWpizza.pizzaName << endl
23          << "Diam of Pizza: " << WWpizza.pizzaDiam << endl
24          << "Weight of Pizza: " << WWpizza.pizzaWeight << endl;
25     
26     return 0;
27 }