编写一个C++程序，如下述输出示例所示的那样请求并显示信息：
What is your first name? Betty Sue
What is your last name? Yewe
What letter grade do you deserve? B
What is your age? 22
Name: Yewe, Betty Sue
Grade:
Age: 22
#include <iostream>
using namespace std;
int main() {
// string first;
char first[20];
// string last;
char last[20];
int age;
char grade;
cout << "what is your first name?" << endl;
// getline(cin,first);
cin.getline(first, 20);
cout << "what is your last name?" << endl;
// getline(cin,last);
cin.getline(last, 20);
cout << "what letter grade do you deserve?" << endl;
cin >> grade;
cout << "what is your age?" << endl;
cin >> age;
cout << "Name: " << first << ", " << last << endl;
cout << "Grade: " << grade << endl;
cout << "Age: " << age << endl;
return 0;
}
CandyBar结构包含3个成员，分别为品牌名称、重量和热量。请编写一个函数，参数包含CandyBar的引用、char指针、double和int作为参数，并用最后3个参数作为结构成员的值，其默认值分别为“Millennium Munch”、2.85和350，函数需要显示结构。并创建一个包含3个元素的CandyBar数组…
#include <iostream>
using namespace std;
int main() {
struct CandyBar{
string name;
float weight;
int calorie;
};
CandyBar snack[3] = {
{"Mocha Munch",2.3,350},
{"Mocha1 Munch",2.4,450},
{"Mocha2 Munch",2.5,550},
};
cout << "The snack name is " << snack[0].name << " weight is " << snack[0].weight << " calories is " << snack[0].calorie << endl;
cout << "The snack1 name is " << snack[1].name << " weight is " << snack[1].weight << " calories is " << snack[1].calorie << endl;
cout << "The snack2 name is " << snack[2].name << " weight is " << snack[2].weight << " calories is " << snack[2].calorie << endl;
return 0;
}
William Wingate 从事披萨饼分析服务。对于每个披萨饼，他都需要记录下列信息：
（1）披萨饼公司的名称，可以有多个单词组成
（2）披萨饼的直径
（3）披萨饼的重量
请设计一个能够存储这些信息的结构，并编写一个使用这种结构变量的程序。
程序将请求用户输入上述信息，然后显示这些信息。请使用cin（或它的方法）和cout。
#include <iostream>
using namespace std;
int main() {
struct Pizza{
string name;
float diameter;
float weight;
};
Pizza pizza;
cout << "Please enter pizza name!" << endl;
getline(cin, pizza.name);
cout << "Please enter pizza diameter!" << endl;
cin >> pizza.diameter;
cout << "Please enter pizza weight!" << endl;
cin >> pizza.weight;
cout << "The pizza name is " << pizza.name << " diameter is " << pizza.diameter << " weight is " << pizza.weight;
return 0;
}
完成编程练习7，但使用new来为结构分配内存，而不是声明一个结构变量。
另外，让程序在请求输入比萨饼公司名称之前输入披萨饼的直径。
#include <iostream>
using namespace std;
int main() {
struct Pizza{
string name;
float diameter;
float weight;
};
Pizza * pizza = new Pizza;
cout << "Please enter pizza name!" << endl;
getline(cin, pizza->name);
cout << "Please enter pizza diameter!" << endl;
cin >> pizza->diameter;
cout << "Please enter pizza weight!" << endl;
cin >> pizza->weight;
cout << "The pizza name is " << pizza->name << " diameter is " << pizza->diameter << " weight is " << pizza->weight;
return 0;
}
完成编程练习6，但使用new来动态分配数组，而不是声明一个包含3个元素的CandyBar数组。
#include <iostream>
using namespace std;
int main() {
struct CandyBar{
string name;
float weight;
int calorie;
};
CandyBar * snack = new CandyBar[3]{
{"Mocha Munch",2.3,350},
{"Mocha1 Munch",2.4,450},
{"Mocha2 Munch",2.5,550},
};
cout << "The snack name is " << snack[0].name << " weight is " << snack[0].weight << " calories is " << snack[0].calorie << endl;
cout << "The snack1 name is " << snack[1].name << " weight is " << snack[1].weight << " calories is " << snack[1].calorie << endl;
cout << "The snack2 name is " << snack[2].name << " weight is " << snack[2].weight << " calories is " << snack[2].calorie << endl;
return 0;
}
编写一个程序，让用户输入三次40码跑的成绩（如果您愿意，也可以让用户输入40米跑的成绩），
并显示次数和平均成绩，请使用一个array对象来存储数据。
#include <iostream>
#include "array"
using namespace std;
int main() {
array<double , 4> grade;
cout << "Enter 4 garden!(Enter key to enter the next one)" << endl;
cin >> grade[0];
cin >> grade[1];
cin >> grade[2];
cin >> grade[3];
cout << "First garde is: " << grade[0] << endl;
cout << "Second garde is: " << grade[1] << endl;
cout << "Third garde is: " << grade[2] << endl;
cout << "Fourth garde is: " << grade[3] << endl;
return 0;
}
编写一个要求用户输入两个整数的程序。该程序将计算并输出这两个整数之间(包括这两个整数)所有整数的和。这里假设先输入较小的整数。例如,如果用户输入的是2和9,则程序将指出2~9之间所有整数和为44.
#include <iostream>
using namespace std;
int main() {
int min, max;
int sum = 0;
cout << "Enter a min number!" << endl;
cin >> min;
cout << "Enter a max number!" << endl;
cin >> max;
for(min; min <= max; min++){
sum = sum + min;
};
cout << "Sum = " << sum << endl;
return 0;
}
使用array对象（而不是数组）和long double（而不是long long）重新编写程序清单5.4，并计算100！的值。
#include <iostream>
#include "array"
using namespace std;
const int ArSize = 101;
int main() {
array<long double, ArSize> factorials;
factorials[0] = factorials[1] = 1L;
int j;
for(int i = 2 ; i < ArSize ; i++){
factorials[i] = factorials[i-1] * i;
j = i;
}
cout << j << "! = " << factorials[j] << endl;
return 0;
}
编写一个要求用户输入数字的程序。每次输入后，程序都将报告到目前为止，所有输入的累计和。当用户输入0时，程序结束。
#include <iostream>
using namespace std;
int main() {
double number, sum;
do{
cout << "Enter 0 to end!" << endl;
cin >> number;
sum += number;
cout << "Sum = " << sum << endl;
} while (number != 0);
cout << "END!!!!!" << endl;
return 0;
}
Daphe以10%的单利投资了100美元。也就是说，每一年的利润都是投资额的10%，即每年10美元：
利息 = 0.10x原始存款
而Cleo以5%的复利投资了100美元。也就是说，；利息是当前存款（包括获得利息）的5%；
利息 = 0.05x当前存款
Cleo在第一年投资100美元的盈利是5%，计算多少年后，Cleo的投资价值才能超过Daphne的投资价值，并显示此时两人的投资价值。
#include <iostream>
using namespace std;
int main() {
double Daphne = 100, valueD = 0,Cleo = 100, valueC = 0;
int year;
for(int i = 1, j = 1; valueD >= valueC; i++, j++){
valueD += Daphne * 0.1;
valueC = Cleo * 0.05;
Cleo += Cleo + valueC;
year = i;
}
cout << year << " years Cleo value > Daphne value " << endl;
cout << "Daphne value is : " << valueD << endl;
cout << "ClEO value is : " << valueC << endl;
return 0;
}
*假设要销售《C++ For Fools》一书。请编写一个程序，输入全年中每个月的销售量（图书数量，而不是销售额）。程序通过循环，使用初始化为月份字符串的char 数组（或string对象数组）逐月进行提示，并将输入的数据储存在一个int数组中。然后程序计算数组中各元素的总数，并报告这一年的销售情况。
完成上述编程练习，使用一个二维数组来存储输入——3年中每个月的销售量。程序将报告每年销售量以及三年的总销售量。
#include <iostream>
#include "string"
using namespace std;
const int arrSizeM = 12, arrSizeY = 3;
const string month[] = {
"Jan","Feb","Mar","Apr","May","Jun",
"July","Aug","Sqp","Oct","Nov","Dec"
};
int main() {
int num[arrSizeY][arrSizeM];
int years[3] = {1, 2, 3};
for(int i = 0; i < arrSizeY; i++){
for(int j = 0; j < arrSizeM; j++ ){
cout << "Enter books sales for " << month[j] << " in " << years[i] << endl;
cin >> num[i][j];
}
};
cout << " ";
for(int i = 0; i < arrSizeM; i++){
cout << month[i] << " ";
};
cout << " sum " << endl;
int sum[3] = {0, 0, 0};
for(int i = 0; i < arrSizeY; i++){
cout << years[i] << " : ";
for (int j = 0; j < arrSizeM; j++) {
cout << num[i][j] << " ";
sum[i] += num[i][j];
}
cout << sum[i] << endl;
}
cout << "Sum = " << sum[0] + sum[1] + sum[2];
return 0;
}
设计一个名为car的结构，用它存储下述有关汽车的信息： 生产商（存储在字符数组或string对象中的字符串）、 生产年份（整数）。编写一个程序，向用户询问有多少辆汽车。随后，程序使用new来创建一个由相应数量的car结构组成的动态数组。 接下来，程序提示用户输入每辆车的生产商（可能由多个单词组成）和年份信息。请注意，这需要特别小心，因为它将交替读取 数值和字符串。
#include <iostream>
#include "string"
using namespace std;
int main() {
struct car{
string name;
int year;
};
int number;
cout << "How many cars do you wish to catalog?" << endl;
cin >> number;
car * cars = new car[number]{};
for (int i = 0; i < number; i++) {
cout << "Car #" << i + 1 << endl;
cout << "Please enter the make: " << endl;
cin.get();
getline(cin, cars[i].name);
cout << "Please enter the year made: " << endl;
cin >> cars[i].year;
}
cout << "Here is your collection:" << endl;
for (int i =0; i < number; i++) {
cout << cars[i].year << " " << cars[i].name << endl;
}
return 0;
}
编写一个程序，它使用一个char数组和循环来每次读取一个单词，直到用户输入done为止。随后该程序指出用户输入了多少个单词（不包括done在内）
#include <iostream>
#include <cstring>
using namespace std;
const int arrSize = 20;
int main() {
char * words[arrSize];
int i = 0, sum = 0;
cout << "Enter words (to stop , type the word done)" << endl;
cin >> words[i];
while (strcmp(words[i], "done") != 0){
++i;
sum++;
char * n;
cin.get();
cin >> n;
words[i] = n;
}
cout << "You entered a total of " << sum << " words." << endl;
return 0;
}
