题目:
3.编写一个菜单驱动程序的雏形。该程序显示一个提供4个选项的菜单——每个选项用一个字母标记。如果用户使用有效选项之外的字母进行响应,程序将提示用户输入一个有效的字母,直到用户这样做为止。然后,该程序使用一条switch语句,根据用户的选择执行一个简单操作。该程序的运行情况如下:
Please enter one of the following choices:
c) carnivore p) pianist
t) tree g)game
f
Please enter a c, p, t, or g: q
Please enter a c, p, t, or g: t
a maple is a tree.
答案: 书上无答案。
C++技术网辅导详解解答:
参考代码:
#include <iostream>
using namespace std;
int main()
{
cout << "Please enter one of the following choices :\n";
cout << "c) carnivore p) pianist\n";
cout << "t) tree g) game\n";
char ch;
while (cin >> ch)
{
switch (ch)
{
case 'c':
cout << "a maple is a carnivore.\n";
break;
case 'p':
cout << "a maple is a pianist.\n";
break;
case 't':
cout << "a maple is a tree.\n";
break;
case 'g':
cout << "a maple is a game.\n";
break;
default:
cout << "Please enter a c, p, t, or g:";
}
}
return 0;
}