//arrayone.cpp -- small arrays of inegers
#include <iostream>/*主函数*/
int main()
{using namespace std;int yams[3];  //creates array with threa elements (定义一个数组)yams[0] = 7;  //assign value to first element (给yams[]数组赋值)yams[1] = 8;yams[2] = 6;int yamcosts[3] = { 20,30,5 };  //create, initialize array//NOTE: It your C++ compiler or translator can't initialeze//this array ,use static int yamcosts[3] instead of//int yamcosts[3]/*打印出来或是显示出来*/cout << "Total yams = ";cout << yams[0] + yams[1] + yams[2] << endl;cout << "The package with " << yams[1] << " yams costs ";cout << yamcosts[1] << " cents per yam.\n";int total = yams[0] * yamcosts[0] + yams[1] * yamcosts[1];  //定义一个 total ，并赋值total = total + yams[2] * yamcosts[2];cout << "The total yam expense is " << total << " cents.\n";cout << "\nSize of yams array = " << sizeof yams;  //sizeof yams : 这表明yams是一个数组，而yams[1]只是一个int变量cout << "bytes.\n";cout << "Size of one element = " << sizeof yams[0];return 0;
}

 double earnings[4]   {1.2e4, 1.6e4, 1.1e4, 1.7e4};    //okay with C++11

unsigned int counts[10] = {};    //all  elements  set to  0float balances[100]   { };          //all  elements  set  to  0

//stringe.cpp -- storing strings in an array
#include <iostream>
#include <cstring>  //for the strlen() function/*主函数*/
int main()
{using namespace std;const int Size = 15;char name1[Size];  //empty arraychar name2[Size] = "C++owboy";//initalized array//NOTE: some implementations may require the staic keyword//to initialize the array name2
cout << "Howdy! I'm " << name2;cout << "! What's your name?\n ";cin >> name1;cout << "well, " << name1 << ", your name has ";cout << strlen(name1) << " letters and is stored\n";cout << "in an array of " << sizeof(name1) << " bytes.\n";cout << "Your initial is " << name1[0] << ".\n";name2[3] = '\n';   //set to null charactercout << "Here are the firet 3 characters of my name: ";cout << name2 << endl;return 0;
}

//instrl.cpp -- reading more than one string
#include <iostream>/*主函数*/
int main()
{using namespace std;const int ArSize = 20;char name[ArSize];char dessert[ArSize];cout << "Enter your name: \n";cin >> name;cout << "Enter your favorite dessert : \n";cin >> dessert;cout << "I have some delicous " << dessert;cout << " for you, " << name << ".\n";return 0;
}

              cin.getline(name,20);

//instr2.cpp -- reading more than word with retline
//              阅读多于与retline的单词
#include <iostream>/*主函数*/
int main()
{using namespace std;const int ArSize = 20;char name[ArSize];char dessert[ArSize];cout << "Enter your name : \n";cin.getline(name, ArSize);    //reads through newline（读通过换行符）cout << "Enter your favorit dessert : \n";cin.getline(dessert,ArSize);cout << "I have some delicious " << dessert;cout << " for you, " << name << ".\n";return 0;
}

              cin.get(name,ArSize);cin.get(dessert,Arsize);    // a  problem  (一个问题)

                cin.get(name,ArSize);  //read first line  (读第一行)cin.get();  //read newline   (读换行符)cin.get(dessert,Arsize);  //read second  line  (读第二行)

              cin.get(name,ArSize).get();   //concatenate member  functions   (将成员函数)

              cin.getline(name1,ArSize),getline(name2,ArSize);

//instr3.cpp -- reading more than one word with get() & get()
#include <iostream>
/*主函数*/
int main()
{using namespace std;const int ArSize = 20;char name[ArSize];char dessert[ArSize];/*显示或打印*/cout << "Enter youy name:\n";cin.get(name,ArSize).get(); //read string,newline  (读取字符串,换行符)cout << "Enter your favorite dessert:\n";cin.get(dessert,ArSize).get();  //读取字符串,换行符cout << "I have some delicious " << dessert;cout << " for you ," << name << ".\n";return 0;
}

    cin.clear();

//unmstr.cpp -- following number input with line input
#include <iostream>
/*主函数*/
int main()
{using namespace std;cout << "What year was your house built?\n";int year;  //定义一个int类型变量cin >> year;   //输入一个数字cout << "What is its street address?\n";char address[80];  //定义一个char数组cin.getline(address, 80);cout << "Year built: " << year << endl;cout << "Address: " << address << endl;cout << "Done!\n";return 0;
}

//strtype1.cpp  -- using the C++ string class :使用c++ string类
#include <iostream>
#include <string>      //make string class available :提供字符串类
/*主函数*/
int main()
{using namespace std;char charr1[20];                //create an empty array :创建一个空数组char charr2[20] = "jaguar";     //create an initialized array :创建一个数组初始化string str1;                    //create an empty string object :创建一个空字符串对象string str2 = "panther";        //create an initialized string :创建一个初始化字符串
cout << "Enter a kind of feline : ";cin >> charr1;   //请在键盘输入cout << "Enter another kind of feline : ";cin >> str1;    //请在键盘输入( use cin for input:使用cin输入)cout << "Eere are some felines : \n";cout << charr1 << " " << charr2 << " "<< str1 << " " << str2   //use cout for output :使用cout为输出<< endl;cout << "The third letter in " << charr2 << " is"<< charr2[2] << endl;cout << "The third letter in " << str2 << " is "<< str2[2] << endl;   //use array notation :使用数组表示法return 0;
}

string str1;        //create an empty string object :创建一个空字符串对象
string str2 = "panther"     //create an initialized string :创建一个初始化字符串

  cin>>str1;          //str1 resized to fit input :str1调整大小以适应输入

char first_date[] = {"Le Chapon Dodu"};
char second_date[] = {"The Elegant Plate"};
string third_date[] = {"The Bread Bowl"};
string fourth_date = {"Hank's Pine Eats"};

char charr1[20];       //create an empty array :创建一个空数组
char charr2[20] = "jaguar";  //create an initialized array :创建一个数组初始化
string str1;                          //create an empty string object :创建一个空字符串对象
string str2 = "pantner";       //create an initialized string :创建一个初始化字符串
charr1 = charr2;                 //INVALID,no array assignment :无效的,没有数组赋值
str1 = str2;                        //VALID  object assignment ok :有效的对象分配好

string str3;         //创建一个空字符串对象
str3 = str1 + str2;    //assign str3 the jpined strings :分配jpined字符串
str1 += str2;           //add str2 to the end of str1 :将str2添加到str1的末尾

//strtye2.cpp  -- assigning,adding,and appending
#include <iostream>
#include <string>    //make string class available 提供字符串类(string 的头文件)/*主函数*/
int main()
{using namespace std;string s1 = "penguin";  //创建一个初始化字符串string s2, s3;          //创建两个空字符串对象
cout << "You can assign one string object to another : s2 = s1\n";s2 = s1;cout << "s1: " << s1 << " ,s2: " << s2 << endl;cout << "You can assign a C-style string to a string object.\n";cout << "s2 = \"buzzard\"\n";s2 = "buzzard";cout << "s2: " << s2 << endl;cout << "You can concatenate strings: s3 = s1 + s2\n";s3 = s1 + s2;cout << "s3: " << s3 << endl;cout << "You can append strings.\n";s1 += s2;cout << "s1 += s2 yields s1 = " << s1 << endl;s2 += "for a day";cout << "s2 += \"for a day\" yields s2 = " << s2 << endl;return 0;
}

strcpy[charr1,charr2];            //copt charr2 to charr1:科普特人charr2,charr1

strcat[charr1,charr2];            //append contents of charr2 to charr1                                  //append内容的charr2到charr1

//strtype3.cpp  -- more string class featuree
#include <iostream>
#include <string>   //make string class available:提供字符串类
#include <cstring>   //C-style string library:c风格的字符串库/*主函数*/
int main()
{using namespace std;char charr1[20];  char charr2[20] = "jaguar";string str1;string str2 = "panther";//assignment for string objects and character arrays:分配字符串对象和字符数组str1 = str2;               //copy str2 to str1 :复制str2 str1strcpy(charr1, charr2);    //copy charr2 to charr1 :复制charr2 charr1//appending for string objects and character arrays:附加字符串对象和字符数组str1 += " paste";         //add paste to end of atr1:添加粘贴到atr1结束strcat(charr1, " juice");  //add juice to end of charr1:将果汁添加到charr1末端//finding the Jength of a string object and a C-style string //找到一个字符串对象的Jength和c样式的字符串int len1 = str1.size();        //obtain length of str1:获得str1长度int len2 = strlen(charr1);     //obtain length of charr1:获得charr1长度
cout << "The string " << str1 << " contains "<< len1 << " characters.\n";cout << "The string " << charr1 << " contains "<< len2 << " characters.\n";return 0;
}

str3 = str1 + str2

strcpy(charr3,charr1);
strcat(charr3,charr2);

char site[10] = "house";
strcat(site,"of pancakes");    //memory problem:内存问题

int len1 = str1.size();   //obtain length of str1:获得str1长度
int len2 = strlen(charr1);   //obtain  length of charr1 :获得charr1长度

//strtype4.cpp  -- line input
#include <iostream>
#include <string>    //make string class available :提供字符串类
#include <cstring>  //C-style string library:c风格的字符串库/*主函数*/
int main()
{using namespace std;char charr[20];string str;cout << "Length of string in charr before input: "<< strlen(charr) << endl;cout << "Length of string in str before input : "<< str.size() << endl;cout << "Enter a line of text : \n";cin.getline(charr, 20);       //indicate maximum length:表示最大长度cout << " You entered : " << charr << endl;cout << "Enter another line of text : \n";getline(cin, str);         //cin now an argument;no length specifier:现在是一个论点，没有长度说明cout << "You entered : " << str << endl;cout << "Length of string in charr after input : "<< strlen(charr) << endl;cout << "Length of string in str after input : "<< str.size() << endl;return 0;
}

 cin.getline(charr, 20);

getline(cin, str);

 cin >>str;     //read a word  into the  atr string  object:

//读取一个单词到atr字符串对象

cin >> x;     //read a value into a basic  C++  type//将一个值读入一个基本的c++类型

struct inflatable             //structure  declaration  :结构声明
{char name[20];   //创建一个空字符数组float volume;double price;
}

inflatable hat; //hat is a structure variable of type inflatable : 帽子是可充气的结构变量
inflatable woopie_cushion;  //type inflatable variable
inflatable mainframe;   //type inflatable variable : 充气型变量

struct inflatable goose;  //keyword struct required in C :关键字结构要求在C
inflatable vincent;  //keyword struct not required in C++:在c++中不需要使用关键字结构

//structur.cpp -- a simple structure :一个简单的结构
#include <iostream>/*创建结构*/
struct inflatable  //结构声明 (structure declaration)
{char name[20];  //创建一个空字符数组float volume;   //创建一个float类型的（volume）体积double price;   //创建一个double类型的（price）价格
};/*主函数*/
int main()
{using namespace std;inflatable guest ={"Gloious Gloria",    //name value 名义价值1.88,                //volume value 体积值29.99               //price value  价格的价值};    //guest is a structure variable of type inflatable 客人是一种可充气的结构变量//It's initialized to the indicated values :它被初始化为表示值inflatable pal ={"Audacious Arthur",3.12,32.99};  //pal is a second variable of type inflatable :pal是可充气的第二个变量//NOTE:some implementations require using  :注意:一些实现需要usi//static inflatable guest = : 静态充气客人=cout << "Expand your guest list with " << guest.name;cout << " and " << pal.name << "!\n";//pal.name is the name member of the pal variablecout << "You can have both for $";cout << guest.price + pal.price << ".\n";return 0;
}