C++ 学习笔记 - 《C++ Primer Plus》习题 2.7

C++ 学习笔记 - 《C++ Primer Plus》习题 2.7

1. 显示姓名和地址

   #include <iostream>
   using namespace std;
   
   int main()
   {
       //char name[5] = {'J', 'e', 'f', 'f', '\0'};
       //char address[9] = {'S', 'h', 'e', 'n', 'z', 'h', 'e', 'n', '\0'};
       char name[] = "Jeff";
       char address[] = "Shenzhen";
   
       cout << "My name is " << name << "." << endl;
       cout << "I live in " << address << "." << endl;
   
       return 0;
   }

2. 单位转换（1 long = 220 码）

   #include <iostream>
   using namespace std;
   
   int main()
   {
       int m = 0;
   
       cout    << "请输入一个long型数：";
       cin     >> m;
       cout    << m << " long = " << m * 220 << " 码" << endl;
   
       return 0;
   }

3. 函数的应用1

   #include <iostream>
   using namespace std;
   
   void func1();
   void func2();
   
   int main()
   {
       func1();
       func1();
       func2();
       func2();
   
       return 0;
   }
   
   void func1()
   {
       cout << "Three blind mice." << endl;
   }
   
   void func2()
   {
      cout << "See how they run." << endl;
   }

4. 函数的应用2

   #include <iostream>
   using namespace std;
   
   int func1(int);
   
   int main()
   {
       int age;
   
       cout << "Enter your age: ";
       cin >> age;
       cout << "该年龄包含" << func1(age) << "个月。" << endl;
   
       return 0;
   }
   
   int func1(int age)
   {
       return age * 12;
   

5. 函数的应用3

   #include <iostream>
   using namespace std;
   
   float func1(float);
   
   int main()
   {
       float lightYears;
   
       cout << "Please enter the number of light years: ";
       cin >> lightYears;
       cout << lightYears << " light years = " << func1(lightYears) << " astronomical units." << endl;
   
       return 0;
   }
   
   float func1(float lightYears)
   {
       return lightYears * 63240.0;
   }

6. 函数的应用4

   #include <iostream>
   using namespace std;
   
   void func1(int hours, int minutes);
   
   int main()
   {
       int hours, minutes;
   
       cout << "Enter the number of hours: ";
       cin >> hours;
       cout << "Enter the number of minutes: ";
       cin >> minutes;
       func1(hours, minutes);
   
       return 0;
   }
   
   void func1(int hours, int minutes)
   {
       cout << "Time: " << hours << ":" << minutes << endl;;
   }