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C++ Primer第五章课后编程题
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内容图文
1、
代码
#include<iostream>
int main()
{
using namespace std;
int num1;
int num2;
int total=0;
cout << "请输入开始数字\n";
cin >> num1;
cout << "请输入结束数字\n";
cin >> num2;
for (num1; num1<=num2; num1++)
total = num1 + total;
cout << num1 << " 和 " << num2 << "之间的整数和为 " << total <<endl;
return 0;
}
运行结果
2、
代码
#include<iostream>
int main()
{
using namespace std;
double total = 0.0;
double in;
cout << "请输入数字：";
cin >> in;
while (in != 0)
{
total += in;
cout << "所有输入数的和为：" << total << "\n";
cout << "请输入下一个数字：";
cin >> in;
}
cout << "运行结束";
return 0;
}
运行结果
3、
代码
#include<iostream>
int main()
{
using namespace std;
double daphne=100;
double cleo=100;
int year=1;
while (daphne >= cleo)
{
daphne += 100*0.1;
cleo += cleo*0.05;
cout << "第" << year << "年,daphne投资价值为 " << daphne << "cleo投资价值为 " << cleo <<endl;
year++;
}
cout << "第 " << year << "年,时cleo超过daphne的投资价值"<< endl;
return 0;
}
运行结果
4、
代码
#include<iostream>
const char *months[12] = {"一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"};
int main()
{
using namespace std;
int sales[12];
int total;
for (int i=1; i<=12; i++)
{
cout << "请输入" << months[i-1] << "销售数量:";
cin >> sales[i-1];
}
for (int j=0; j<12; j++)
{
total = total+sales[j];
}
cout << "总销售为:" << total <<endl;
return 0;
}
运行结果
5、
代码
#include<iostream>
const char *months[12] = {"一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"};
int main()
{
using namespace std;
int sales[3][12];
int total[3] = {0}; //一定要初始化。不然初始值不为0
int sum;
for (int a=1;a<=3;a++)
{
for (int i=1; i<=12; i++)
{
cout << "请输入第"<< a << "年" << months[i-1] << "销售数量:";
cin >> sales[a-1][i-1];
}
}
for (int b=0; b<3; b++)
{
for (int j=0; j<12; j++)
{
total[b] = total[b]+sales[b][j];
}
sum = sum + total[b];
cout << "第" << b+1 << "年总销量为" << total[b] <<endl;
}
cout << "总销售为:" << sum <<endl;
return 0;
}
运行结果
6、
代码
<pre name="code" class="cpp">//一定要加while (cin.get() != '\n');
#include<iostream>
using namespace std;
const int LEN = 60;
struct Car
{
char brand[LEN];
int year;
};
int main()
{
int num;
cout << "How many cars do you wish to catalog?";
cin >> num;
while (cin.get() != '\n');
Car *ps = new Car[num];
for (int i=0;i<num;i++)
{
cout << "Car #" << (i+1) << ":\n";
cout << "Please enter the make:";
cin.getline(ps[i].brand, LEN);
cout << "Please enter the year made:";
cin >> ps[i].year;
while(cin.get() != '\n');
}
cout << "Here is your collection:\n";
for (int i=0; i<num; i++)
{
cout << ps[i].year << " " << ps[i].brand <<endl;
}
delete [] ps;
return 0;
}
运行结果
7、
代码
#include<iostream>
#include<cstring>
const int STR_LEN=60;
int main()
{
using namespace std;
char words[STR_LEN];
int count=0;
cout << "Enter words(to stop,type the word done):\n";
while (cin >> words && strcmp("done", words))
++count;
cout << "You entered a total of " << count << " words .\n" <<endl;
return 0;
}
运行结果
8、
代码
#include<iostream>
#include<string>
int main()
{
using namespace std;
string words;
int count=0;
cout << "Enter words {to stop,type the word done}:\n";
while (cin >> words && words != "done")
++count;
cout << "You entered a total of " << count << " words .\n";
return 0;
}
运行结果
9、
代码
#include<iostream>
int main()
{
using namespace std;
int row;
cout << "Enter number of row:";
cin >> row;
for (int i=0; i<row; i++)
{
for (int j=row-i; j>1; j--)
{
cout << ".";
}
for (int k=0; k<=i; k++)
{
cout << "*";
}
cout << "\n";
}
return 0;
}
运行结果
原文：http://blog.csdn.net/guugle2010/article/details/40541001
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