C++ Primer Plus（6th）第四章 编程练习题答案
1.输出实例显示信息
#include "stdafx.h"
#include
using namespace std;
int main()
{
char first_name[32];
char last_name[32];
char letter;
int age;
cout<<"What is your first name? ";
cin.getline(first_name, 128);
cout<<"What is your last name? ";
cin.getline(last_name, 128);
cout<<"What letter grade do you deserve? ";
cin>>letter;
cout<<"What is your age? ";
cin>>age;
cout<<"Name: "< 2. 修改4.4
#include "stdafx.h"
#include
#include
using namespace std;
int main()
{
const int ArSize = 20;
string name;
string dessert;
cout<<"Enter your name:\n";
getline(cin,name);
cout<<"Enter your favourite dessert:\n";
getline(cin, dessert);
cout<<"I have some delicious "< 3.先姓再名
#include "stdafx.h"
#include
#include
using namespace std;
int main()
{
char first_name[256];
char last_name[256];
cout<<"Enter your fitst name:";
cin.getline(first_name, 256);
cout<<"Enter your last name:";
cin.getline(last_name, 256);
cout<<"Here's your infomation is a single string: "
< 4.先姓再名
#include "stdafx.h"
#include
#include
using namespace std;
int main()
{
string first_name;
string last_name;
cout<<"Enter your first name: ";
getline(cin,first_name);
cout<<"Enter your last name: ";
getline(cin,last_name);
cout<<"Here's your infomation is a single string: "<< last_name
<< ", "< 5.CandyBar
#include "stdafx.h"
#include
#include
using namespace std;
typedef struct CandyBar{
string name;
double weight;
int calories;
};
int main()
{
CandyBar candybar={"Mocha Munch", 2.3, 350};
cout<<"the infomation of CandyBar, Name: "< 6.CandyBar
#include "stdafx.h"
#include
#include
using namespace std;
typedef struct CandyBar{
string name;
double weight;
int calories;
};
int main()
{
CandyBar candybar[3]={
{"HI",2.3,350},
{"OH",3.5,400},
{"HA",3.0,370}
};
for(int i=0;i<3;i++)
{
cout<<"the infomation of CandyBar, Name: "< 7.披萨
#include "stdafx.h"
#include
#include
using namespace std;
typedef struct PIZZA_INFO{
string name;
double size;
double weight;
};
int main()
{
PIZZA_INFO pizz_info;
cout<<"Enter the pizza company name: ";
getline(cin, pizz_info.name);
cout<<"Enter the pizza size: ";
cin>>pizz_info.size;
cout<<"Enter the pizza weight: ";
cin>>pizz_info.weight;
cout<<"The company name of pizza is "< 8.完成练习7，使用new来为结构分配内存
#include "stdafx.h"
#include
#include
using namespace std;
typedef struct PIZZA_INFO {
string name;
double size;
double weight;
};
int main()
{
PIZZA_INFO *pizza_info = new PIZZA_INFO;
cout<<"Enter the pizza size: ";
cin>>pizza_info->size;
cout<<"Enter the pizza company name: ";
cin>>pizza_info->name;
cout<<"Enter the pizza weight: ";
cin>>pizza_info->weight;
cout<<"The company name of pizza is "<name
<<", the size of the pizza is "<size
<<", the weight of the pizza is "<weight< 9.完成练习6，使用new来动态分配数组
#include "stdafx.h"
#include
#include
using namespace std;
typedef struct CandyBar{
string name;
double weight;
int calories;
};
int main()
{
CandyBar *pcandybar=new CandyBar[3]{
{"HI",2.3,350},
{"OH",3.5,400},
{"HA",3.0,370}
};
for(int i=0;i<3;i++)
{
cout<<"the infomation of CandyBar, Name: "< 10.输入三次40码跑的成绩
#include "stdafx.h"
#include
#include
using namespace std;
int main()
{
array time;
double avg_time = 0.0;
printf("Enter three results time of runing 40 meters: ");
cin>>time[0];
cin>>time[1];
cin>>time[2];
avg_time=(time[0]+time[1]+time[2])/3;
cout<<"Result: "<