CPP_Basic_Code_P6.1-PP6.11.9
// The Notes Created by Z-Tech on 2017/2/17.
// All Codes Boot on 《C++ Primer Plus》V6.0
// OS：MacOS 10.12.4
// Translater：clang/llvm8.0.0 &g++4.2.1
// Editer：iTerm 2&Sublime text 3
// IDE: Xcode8.2.1&Clion2017.1
//P6.1
#include
int main()
{
using std::cin;
using std::cout;
char ch;
int spaces=0;//外部全局变量
int total=0;//外部全局变量
cin.get(ch);//读取第一个字符
while (ch!='.')//如果不是句号则继续循环
{
if (ch==' ')
++spaces;//遇到空格计数
++total;//无论是否空格均计数，且字符总数包含最后的回车生成的换行符
cin.get(ch);
}
cout<
int main()
{
char ch;
std::cout<<"Type,and I shall repeat.\n";
std::cin.get(ch);
while (ch!='.')
{
if (ch=='\n')
std::cout<
const int fave=9;
int main()
{
using namespace std;
int n;
cout<<"Enter a number in the range 1-100 to find"
<<"my favorite number: ";
do{
cin>>n;
if (nfave)//这种写法实际上是一个if else被包含在另一个if else中
cout<<"Too high! Then guess again: ";
else//这样调整后的写法实际上更清晰更好
cout<
int main()
{
using namespace std;
cout<<"This program may reformat your hard disk\n"//引号具有输出流连续性
"and destroy all your data.\n"
"Do you wish to continue? ";
char ch;
cin>>ch;
if (ch=='y'||ch=='Y')//或运算符，或真则真，满足其一即可
cout<<"You were warned!\a\a\n";
else if (ch=='n'||ch=='N')//再次使用
cout<<"A wise choice...Bye!\n";
else
cout<<"That's wasn't a 'Y/y' or 'N/n'!Apparently you "
"can't follow\ninstructions,so "
"I'll trash your disk anyway.\a\a\a\n";
return 0;
}
//P6.5
#include
const int ArSize=10;//控制数组大小，即报价个数
int main()
{
using namespace std;
float naaq[ArSize];
cout<<"Enter the NAAQs (New Age Awareness Quotients) "
<<"Of\nyour neighbors. Program terminates "
<<"when you make\n"<>temp;
while (i=0)//第一个条件保证数组不溢出，第二个条件确保输入报价有效
{
naaq[i]=temp;//有效则逐个存入数组
++i;//数组角标自增
if (i>temp;//再次赋值给temp后继续循环直到存满数组
}
}
if (i==0)//意味着输入了一个不满足第二个条件的数，于是未进入过while循环
cout<<"No data--bye\n";//如果中途输入了负数则会跳过这里直接到下一模块请求自己报价，因为中途i!=0
else
{
cout<<"Enter your NAAQ: ";//输入自己的报价
float you;
cin>>you;
int count=0;//设定比较计数器
for (int j=0;jyou)//如果之前报价你自己输入的高，则计数器+1
++count;//逐个比较直到循环结束
cout<
const char* qualify[4]//创建指向字符串的常量指针数组
{
"10,000-meter race.\n",
"mud tug-of-war.\n",
"masters canoe jousting.\n",
"pie-throwing festival.\n"
};
int main()
{
using namespace std;
int age;
cout<<"Enter your age in years: ";
cin>>age;
int index;
if (age>17&&age<35)//18-34
index=0;
else if (age>=35&&age<50)//35-49
index=1;
else if (age>=50&age<65)//50-64，且可见else if可以连续使用
index=2;
else //包括负数，0-17,65以上；但是年龄默认不会输入负数
index=3;
cout<<"Your qualify for the "<
#include
bool is_int(double);//函数声明
int main()
{
using namespace std;
double num;
cout<<"Yo,dude!Enter an intger value: ";
cin>>num;
while (!is_int(num))//while条件函数调用取反
{
cout<<"Out if range __ Please try again: ";
cin>>num;
}
int val=int (num);
cout<<"You've entered the integer "<=INT_MIN)
return true;//输入范围成功则返回true，取反为false，则while被跳过
else
return false;//超出范围，返回false，取反为true，则while被激活，提示重新输入
}
//P6.8
#include
#include
int main()
{
using namespace std;
cout<<"Enter text for analysis and type @"
" to terminate input.\n";
char ch;
int whitespace=0;
int digits=0;
int chars=0;
int punct=0;
int others=0;
cin.get(ch);
while (ch!='@')
{
if (isalpha(ch))//字母检查
chars++;
else if (isspace(ch))//空白符检查
whitespace++;
else if (isdigit(ch))//数字检查
digits++;
else if (ispunct(ch))//标点检查
punct++;
else
others++;//剩下的归于其它，比如汉字等特殊符号
cin.get(ch);
}
cout<//求出两个数最大值
int main()
{
using namespace std;
int a,b;
cout<<"Enter two integers: ";
cin>>a>>b;
cout<<"The larger of "<b?a:b;//使用了?:条件运算符
cout<<" is "<
using namespace std;
void showmenu();//无参无返回值函数声明
void report();
void comfort();
int main()
{
showmenu();//函数调用显示菜单
int choice;
cin>>choice;
while (choice!=5)
{
switch (choice)
{
case 1: cout<<"\a\n";
break;//跳出循环
case 2: report();
break;
case 3: cout<<"The boss was in all day.\n";
break;
case 4: comfort();
break;
default: cout<<"That's not a choice.\n";
//缺省分支，后面不需要加break；
}
showmenu();
cin>>choice;
}
cout<<"Bye!\n";
return 0;
}
void showmenu()//菜单函数模块
{
cout<<"Please enter 1,2,3,4,or 5:\n"
"1) alarm 2) report\n"
"3) alibi 4) comfort\n"
"5) quit\n";
}
void report()//报告函数模块
{
cout<<"It's been an excellent week for business.\n"
"Sales are up 120$. Expense are down 35%.\n";
}
void comfort()//安抚模块
{
cout<<"Your employees think you are the finest CEO\n"
"in the industry .The board of directors thinks\n"
"you are the finest CEO in the industry.\n";
}
//P6.10.V2
#include
using namespace std;
void showmenu();//无参无返回值函数声明
void report();
void comfort();
int main()
{
showmenu();//函数调用显示菜单
char choice;//使用英文字符控制
cin>>choice;
while (choice!='Q'&&choice!='q')
{
switch (choice)
{
case 'a'://利用连续执行的特性解决大小写的问题
case 'A': cout<<"\a\n";
break;//跳出循环
case 'b':
case 'B': report();
break;
case 'c':
case 'C': cout<<"The boss was in all day.\n";
break;
case 'd':
case 'D': comfort();
break;
default: cout<<"That's not a choice.\n";//缺省分支，后面不需要加break；
}
showmenu();
cin>>choice;
}
cout<<"Bye!\n";
return 0;
}
void showmenu()//菜单函数模块
{
cout<<"Please enter 1,2,3,4,or 5:\n"
"a) alarm b) report\n"
"c) alibi d) comfort\n"
"q) quit\n";
}
void report()//报告函数模块
{
cout<<"It's been an excellent week for business.\n"
"Sales are up 120$. Expense are down 35%.\n";
}
void comfort()//安抚模块
{
cout<<"Your employees think you are the finest CEO\n"
"in the industry .The board of directors thinks\n"
"you are the finest CEO in the industry.\n";
}
//P6.11
#include
enum {red,orange,yellow,green,blue,violet,indigo};
//int类型 0，1，2，3，4，5，6
//枚举常量声明，没用变量名，注意逗号，结尾分号，和结构声明类似
int main()
{
using namespace std;
cout<<"Enter color code (0-6): ";
int code;
cin>>code;
while (code>=red&&code<=indigo)//范围限定在0-6之间
{
switch (code)//标签
{
case red: cout<<"Her lips were red.\n";break;//注意此处有两个分号
case orange: cout<<"Her hair was orange.\n";break;
case yellow: cout<<"Her shoes were yellow.\n";break;
case green: cout<<"Her nails were green.\n";break;
case blue: cout<<"Her sweatsuit was blue.\n";break;
case violet: cout<<"Her eyes were violet.\n";break;
case indigo: cout<<"Her mood was indigo.\n";break;
}
cout<<"Enter color code (1-6)";
cin>>code;
}
cout<<"Bye.\n";
return 0;
}
//P6.12
#include
const int ArSize=80;
int main()
{
using namespace std;
char line[ArSize];//设定字符数组
int spaces=0;//初始化空格计数器
cout<<"Enter a line of text:\n";
cin.getline(line,ArSize);//字符读入line数组中
cout<<"Complete line:\n"<
const int Max=5;
int main()
{
using namespace std;
double fish[Max];//初始化存重量的数组
cout<<"Please enter the weights of your fish.\n";
cout<<"You may enter up to "<,\n";
cout<<"fish #1: ";
int i=0;
while (i>fish[i])//且假则假，因此当左侧为false，右侧不会被判断，防止数组溢出
{
if (++i//可阻止非法输入并给出正确的提示
const int Max=5;
int main()
{
using namespace std;
int golf[Max];
cout<<"Please enter your golf scores.\n";
cout<<"You must enter "<>golf[i]))//输入失败返回false，取反为true即启用错误处理
{
cin.clear();//重置cin
while (cin.get()!='\n')//读取【行尾】之前所有的错误输入，从而删除这一行的错误输入
continue;//循环直到cin.get()=='\n'，也就是到达行尾
cout<<"Please enter a number: ";
}
}
double total=0.0;
for (i=0;i
#include //重要文件输入输出头文件
int main()
{
using namespace std;
char automobile[50];
int year;
double a_price;
double d_price;
ofstream outFile;//创建ofstream对象——outFile
outFile.open("car_info.txt");//关联对象到文件
//以下是输入读取模块
cout<<"Enter the make and model of automobile: ";
cin.getline(automobile,50);
cout<<"Enter the model year: ";
cin>>year;
cout<<"Enter the original asking price: ";
cin>>a_price;
d_price=0.913*a_price;
//以下是显示输出模块
cout<
#include
//#include //为支持exit()
const int SIZE=60;
int main()
{
using namespace std;
char filename[SIZE];
ifstream inFile;//声明输入文件变量inFile
cout<<"Enter name of data file: ";
cin.getline(filename,SIZE);//读取文件名
inFile.open(filename);//将inFile与filename关联
if (!inFile.is_open())//输入成功则跳过，失败则激活
{
cout<<"Could not open the file "<>value;//读取文件中第一个值
while (inFile.good())//输入正常且未遇到EOF文件尾则继续循环，该方法没有出错时且不遇到EOF时返回均为true
{
++count;
sum+=value;
inFile>>value;//继续读取文件下一个值
}
if (inFile.eof())//到此处说明循环结束到达文件尾,最后一次读取遇到EOF则返回true
cout<<"End of file reached.\n";
else if (inFile.fail())//检测到数据类型不匹配或遇到EOF时均会被激活返回true
cout<<"Input terminated by data mismatch.\n";
else//如果仍然不满足判断条件则说明失败原因未知
cout<<"Input terminated by unknown reason.\n";
if (count==0)//为true则说明未曾进入过读取循环体
cout<<"No data processed.\n";
else//一切正常则进入最终的读取状态统计报告
{
cout<<"Item read: "<
#include
int main()
{
using namespace std;
cout<<"Please enter something: ('@' to quit)";
char words;
cin.get(words);//这比cin>>words更精细
while (words!='@')
{
if (isalpha(words))
{
if (words>='a'&&words<='z')
cout.put(toupper(words));//这里使用字符输出格式，cout默认十进制
else
cout<
#include
int main()
{
using namespace std;
const int ArSize=5;
int i=0,over_avrage=0;
double tmp=0,sum=0,average=0;
double donation[ArSize];
cout<<"Enter the number: ";
while (cin>>tmp&&iaverage)//找出大于平均值的数并计数
++over_avrage;
}
cout<<" sum: "<
#include //调用exit()函数必备
void show_menu();
void Select_c();
void Select_p();
void Select_t();
void Select_g();
void Select_q();
using namespace std;
int main()
{
show_menu();
char choice;
cin.get(choice);
while (choice)//任何选择都继续，意味着只能通过break；跳出循环结束任务
{
switch (choice)
{
case 'c':
case 'C':Select_c();
break;
case 'p':
case 'P':Select_p();
break;
case 't':
case 'T':Select_t();
break;
case 'g':
case 'G':Select_g();
break;
case 'q':
case 'Q':Select_q();
break;
default:cout<<"That's not a choice.\n";//应对随意输入设计
}
show_menu();//此处是防止死循环的关键
cin>>choice;
}
return 0;
}
void show_menu()//子函数括号右边不需要"；"！
{
cout<<"Please enter the following choice: (Use 'q' to quit.)\n"
"c)Carnivo p)Pianist\n"
"t)Tree g)Game\n";
}
void Select_c()
{
cout<<"这个单词的意思是食虫植物。\n";
}
void Select_p()
{
cout<<"钢琴家还是理查德厉害啊！\n";
}
void Select_t()
{
cout<<"链表和二叉树又来了~\n";
}
void Select_g()
{
cout<<"想玩游戏，你想多了吧\n";
}
void Select_q()
{
exit(EXIT_FAILURE);//尝试调用失败返回值
}
//PP6.11.4
#include
#include //调用exit()函数必备
void show_menu();
void Select_a();
void Select_b();
void Select_c();
void Select_d();
void Select_q();
using namespace std;
struct bop
{
string fullname;
string title;
string bopname;
int preference;
};
int main()
{
show_menu();
char choice;
cin.get(choice);
bop* VIP=new bop[5];//指针指向结构数组
VIP[0].fullname="HsuChou Yang";
VIP[0].title="VVVIP";
VIP[0].bopname="Z";
VIP[0].preference=1;
VIP[1].fullname="周杰伦";
VIP[1].title="IP";
VIP[1].bopname="Jay";
VIP[1].preference=2;
VIP[2].fullname="脸红的思春期";
VIP[2].title="RSP";
VIP[2].bopname="RFF";
VIP[2].preference=0;
VIP[3].fullname="金莎";
VIP[3].title="Kim susu";
VIP[3].bopname="Love";
VIP[3].preference=1;
VIP[4].fullname="沢井美空";
VIP[4].title="SwaiMiku";
VIP[4].bopname="美空";
VIP[4].preference=2;
while (choice)//
{
switch (choice)
{
case 'a':
case 'A':
{
for (int i=0;i<5;i++)
cout<>choice;
}
delete [] VIP;
return 0;
}
void show_menu()//菜单函数，子函数括号右边不需要"；"
{
cout << "Please enter the following choice: (Use 'q' to quit.)\n"
"a)display by name b)display by title\n"
"c)display by bopname d)display by preference\n";
}
//PP6.11.5
#include
int main()
{
using namespace std;
double salary,tax;
cout<<"Please enter your salary first: \n";
cin>>salary;
while (salary>=0)
{
if (salary>=35000)
{
tax=(salary-35000)*0.2+20000*0.15+10000*0.1+0;
break;
}
else if (salary>=15001)
{
tax=(salary-15000)*0.15+10000*0.1+0;
break;
}
else if (salary>5000)
{
tax=(salary-5000)*0.1+0;
break;
}
else if (salary<=5000)
{
tax=0;
break;
}
else
{
tax=0;
break;
}
}
while (!cin)//输入不是数字将报错
{
cout<<"That's may not a number.\n";
exit(EXIT_FAILURE);
}
cout<<"Tax that you need to pay: "<
const int ArSize=20;
const int num=5;
struct fund
{
char name[ArSize];
double money;
};
int main()
{
using namespace std;
int count=0,poor=0;//解决无人时none的显示
fund* person=new fund[num];
//以下是数据采集模块
for (int i=0;i>person[i].money;
if (!cin)
{
cout<<"Wrong number! Please run again. ";
exit(EXIT_FAILURE);
}
cin.get();//至关重要，使用cin输入double后需要读取回车
}
cout << "Grand Patrons: \n";//开始输出重要人物
for (int i=0;i 10000)
{
cout << person[i].name << " : " << person[i].money <<"$"<
#include
#include
const int ArSize=20;
int main()
{
using namespace std;
char word[ArSize];
int vowel=0,consonants=0,others=0;
cout<<"Please enter the words： \n";
cin>>word;
cout<>word;
}
cout<<"Vowel: "<
#include
int main()
{
using namespace std;
char filename[20];
int count=0;
ifstream inFile;
cout<<"Enter name of file: ";
cin.getline(filename,20);
inFile.open(filename);
if (!inFile.is_open())
{
exit(EXIT_FAILURE);
}
char ch;
inFile.get(ch);//使用cin将忽略空格，使用get()将不会忽略空格
while (inFile.good())//使用good检查文件读取是否正常，是否抵达文件尾
{
count++;
inFile.get(ch);
}
cout<
#include
const int ArSize=20;
int num=0;//创建的动态结构指针数组成员数
struct fund
{
char name[ArSize];
double money;
};
int main()
{
using namespace std;
//以下是数据初始化模块
int count=0,poor=0;//解决无人时none的显示
fund* person=new fund[num];
char filename[ArSize];
cout<<"Please enter the file name: ";
cin.getline(filename,ArSize);
fstream inFile;
inFile.open(filename);
//以下是文件打开成功检测
if (!inFile.is_open())
{
cout<<"Fail to open the file.\n";
exit(EXIT_FAILURE);
}
//以下是数据读取模块
inFile>>num;//读取应该创建的结构数
inFile.get();//读取数组后再读取换行符
for (int i=0;i>person[i].money;//读取double，注意读取方式
inFile.get();//读取换行符
if (inFile.eof())
{
cout<<"End of file reached：OK！\n";
}
else if (inFile.fail())
{
cout<<"Input terminated by data mismatch.\n";
}
else
continue;
}
cout<< "Grand Patrons: \n";//开始输出重要人物
for (int i=0;i 10000)
{
cout << person[i].name << " : " << person[i].money <<"$"<
