大家帮我改个错 - 编程论坛

#2

VanHorn2008-03-16 15:25

以下是我的思路。欢迎不同意见的朋友发帖交流。
# include <iostream>
int main()
{
    using namespace std;

    int XunHuan=1;
    char ch;

    while(XunHuan)
    {

        cout<<"Please enter one of the following choices:";
        cout<<"c)carnivore\t"<<"p)paianist"
            <<"t)tree\t"<<"q)game";

        cout<<"please enter  c,p,t or q:";

        cin>>ch;

        if(ch=='c'||ch=='p'||ch=='t'||ch=='q')
        {
            XunHuan=0;
        }
        else
        {
            XunHuan=1;
            cout<<"You Have Made A Wrong Choice."<<endl;
        }

    }

    switch(ch)
    { case 'c' : cout<<"A maple is carnivore\t";
    break;
    case 'p' : cout<<"A maple is paianist\v";
        break;
    case 't' : cout<<"A maple is tree\t";
        break;
    case 'q' : cout<<"A maple is game\v";
        break;
    default : cout<<"please enter a c,p,t or q:";


    }

    return 0;
}

[[it] 本帖最后由 VanHorn 于 2008-3-16 15:30 编辑 [/it]]

#3

flysky1022008-03-16 15:51

这个思路不错，可是怎么用循环实现呢？我想用循环实现的

#4

comlative2008-03-16 17:16

没错啊

一楼那位写的就是循环啊，while也是循环啊。

#5

雪城白鸟2008-03-16 17:43

没错吧

循环分为while和for循环

#6

wangxinkai2008-03-16 19:25

char str;
cin>> str;
  cin>>str;
while((srt=='c')?0:(srt=='p'))?0:(srt=='t')?0:(srt=='q'))
{

switch(str)
{ case 'c' : cout<<"A maple is carnivore\t";
    break;
   case 'p' : cout<<"A maple is paianist\v";
    break;
   case 't' : cout<<"A maple is tree\t";
    break;
   case 'q' : cout<<"A maple is game\v";
    break;
   default : cout<<"please enter a c,p,t or q:";
    cin>>str;

}

}
你试试，应该成立。

#7

wangxinkai2008-03-16 19:27

((srt=='c')?0:(srt=='p'))?0:(srt=='t')?0:(srt=='q')？0:1)
写错了。。。。
拉一步

#8

wangxinkai2008-03-16 19:41

# include <iostream>
int main()
{using namespace std;
cout<<"Please enter one of the following choices:";
cout<<"c)carnivore\t"<<"p)paianist"
     <<"t)tree\t"<<"q)game";
char ch;
cout<<"please enter  c,p,t or q:";

    do
    {
         cin>>ch;
        switch(ch)
        { case 'c' : cout<<"A maple is carnivore\t";
            break;
           case 'p' : cout<<"A maple is paianist\v";
            break;
           case 't' : cout<<"A maple is tree\t";
            break;
           case 'q' : cout<<"A maple is game\v";
            break;
           default : cout<<"please enter a c,p,t or q:";


        }
    }
while(((ch=='c')?0:(ch=='p')?0:(ch=='t')?0:(ch=='q')?0:1));

  return 0;
}

#9

flysky1022008-03-16 20:12

比较喜欢8楼的程序，简洁些，谢谢了

#10

flysky1022008-03-16 20:13

while(((ch=='c')?0:(ch=='p')?0:(ch=='t')?0:(ch=='q')?0:1)); //不知道这步还有别的简洁方式吗？

#11

wangxinkai2008-03-16 21:45

好像没有什么比三元更简单的表达式了吧。。。。

#12

jsl20072008-03-17 09:18

# include <iostream>
int main()
{
    using namespace std;
cout<<"Please enter one of the following choices:";
cout<<"c)carnivore\t"<<"p)paianist"
     <<"t)tree\t"<<"q)game";
char c;
cout<<"please enter  c,p,t or q:";

cin>>c;

while((c!='c')||(c!='p')||(c!='t')||(c!='q')){
switch(c)
{ case 'c' : cout<<"A maple is carnivore\t";
    break;
   case 'p' : cout<<"A maple is paianist\v";
    break;
   case 't' : cout<<"A maple is tree\t";
    break;
   case 'q' : cout<<"A maple is game\v";
    break;
   default : cout<<"please enter a c,p,t or q:";

}
cin>>c;
}
  system("pause");
  return 0;
}

#13

tyboy232008-03-17 10:44

支持8楼和12楼的兄弟
我喜欢`a<b?0:1;这种用法

#14

wangxinkai2008-03-17 11:12

12楼的少输出一次。。

#15

q1077580892008-03-17 13:51

# include <iostream>
int main()
{using namespace std;
cout<<"Please enter one of the following choices:\n";
cout<<"c)carnivore\t"<<"p)paianist\n"
     <<"t)tree\t"<<"q)game"<<endl;
char ch;
int i;
i=1;
while(i)
    {cout<<"please enter  c,p,t or q:";

cin>>ch;

    switch(ch)
    { case 'c' : cout<<"A maple is carnivore\t";i=0;
    break;
   case 'p' : cout<<"A maple is paianist\v";i=0;
    break;
   case 't' : cout<<"A maple is tree\t";i=0;
    break;
   case 'q' : cout<<"A maple is game\v";i=0;
    break;
   default :;

        }
}
  system("pause");
  return 0;
}

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#16

flysky1022008-03-17 21:13

while(i) //为什么这么写？循环结束的条件是什么呢？

#17

q1077580892008-03-18 17:42

while(i) 构成一个死循环，结束条件是i=0