Author Topic: Fun Little C++ Pointless Program (Read 7245 times)

meishe91 · « **on:** September 16, 2011, 06:41:22 pm »

I'm a teacher's aide and today the class was taking a quiz so I was pretty bored. So I decided to make a little walking man program using the console window...considering I can't do much else that's what I was limited to haha. Anywho, here is the code.

Code: [Select]

#include <iostream>
#include <iomanip>
using namespace std;

void move(char direction,int &x,int &y)
{
	if(direction=='w')
	{
		y-=(y!=1);
	}
	else if(direction=='s')
	{
		y+=(y!=11);
	}
	else if(direction=='a')
	{
		x-=(x!=1);
	}
	else if(direction=='d')
	{
		x+=(x!=11);
	}
	else {;}
	return;
}
void display(int x,int y)
{
	cout<<"*************\n";
	for(int i=0;i<11;i++)
	{
		if(i+1==y)
		{
			cout<<"*"<<setw(x)<<"X"<<setw(13-x)<<"*\n";
		}
		else
		{
			cout<<"*           *\n";
		}
	}
	cout<<"*************\n";
}

int main()
{
	int x=6;
	int y=6;
	char direction='z';
	while(direction!='q')
	{
		move(direction,x,y);
		display(x,y);
		cin>>direction;
		system("cls");
	}
	system("pause");
	return 0;
}

There really is no purpose to this code at all. Just a little fun. Probably not even the best written code either. If you guys want to make suggestions I am all for them.

Note:
I know of no way of detecting key presses in C++ so that is why you need to input a W, A, S, or D to move him. Also, if you put him in the top-left corner and paste in "ddddddddddssssssssssaaaaaaaaaawwwwwwwwwwsssssddddd" it will do a little box and then go to the middle. Ya...

Anywho, enjoy this random program.

Ashbad · « **Reply #1 on:** September 16, 2011, 06:44:28 pm »

\o/ looks fun

Perhaps for keypresses, if you want to stay with standard non-DOS functions, perhaps just query cin repeatedly?

Or use something like SDL. That would probably overkill, though.

DrDnar · « **Reply #2 on:** September 16, 2011, 06:45:13 pm »

Try doing something like

Code: [Select]

while (char foo != 'q')
{
    cin >> foo;
    cout << (int)foo;
}

With any luck, pressing the arrow keys will return key codes. But, you know, that would probably be too easy.

meishe91 · « **Reply #3 on:** September 16, 2011, 06:48:09 pm »

Quote from: Ashbad on September 16, 2011, 06:44:28 pm

\o/ looks fun

Perhaps for keypresses, if you want to stay with standard non-DOS functions, perhaps just query cin repeatedly? Or use something like SDL. That would probably overkill, though.

Ya...I don't really know what you mean

I'm still pretty much a C++ noob.

Quote from: DrDnar on September 16, 2011, 06:45:13 pm

Try doing something like
Code: [Select]
while (char foo != 'q') { cin >> foo; cout << (int)foo; }With any luck, pressing the arrow keys will return key codes. But, you know, that would probably be too easy.

Ya...double for this post

Sorry, could you explain what that does?

Netham45 · « **Reply #4 on:** September 16, 2011, 06:52:32 pm »

Code: [Select]

while (char foo != 'q')
     foo = cin.get();
     cout << (int)foo;
}

Give that a try. cin.get should return one char off of the stream. It'll also block until it has something to return.

DrDnar · « **Reply #5 on:** September 16, 2011, 06:58:46 pm »

Both of us are getting at the same thing: pressing an arrow key might return a special, non-printable "char". It might not show anything interesting, but it still returns a value. Then, we typecast it to int to print the numerical value of that special char. Netham's cin.get() might work a little better.

calc84maniac · « **Reply #6 on:** September 16, 2011, 07:05:07 pm »

I thought console input waits for the user to press enter, then it starts returning characters one after another (only blocking again after the newline)

meishe91 · « **Reply #7 on:** September 16, 2011, 07:07:32 pm »

I can't get it to work. It keeps saying there is an undeclared identifier and that it is expecting an assignment operator instead of does-not-equal. So I'm not sure if I'm just missing something or if something is going on.

DrDnar · « **Reply #8 on:** September 16, 2011, 07:10:07 pm »

Code: [Select]

char foo = 'a';
while (foo != 'q')
{
     foo = cin.get();
     cout << (int)foo;
}

Ashbad · « **Reply #9 on:** September 16, 2011, 07:10:46 pm »

Quote from: meishe91 on September 16, 2011, 07:07:32 pm

I can't get it to work. It keeps saying there is an undeclared identifier and that it is expecting an assignment operator instead of does-not-equal. So I'm not sure if I'm just missing something or if something is going on.

Probably because Netham's example is missing a bracket right after the 'while' declaration line.

calc84maniac · « **Reply #10 on:** September 16, 2011, 07:11:41 pm »

Technically, it's better practice to use do-while in this case:

Code: [Select]

char foo;
do
{
     foo = cin.get();
     cout << (int)foo;
} while (foo != 'q');

meishe91 · « **Reply #11 on:** September 16, 2011, 07:12:19 pm »

Oh wow...duh. I feel like an idiot now. I'll let ya know.

Quote from: Ashbad on September 16, 2011, 07:10:46 pm

Quote from: meishe91 on September 16, 2011, 07:07:32 pm
I can't get it to work. It keeps saying there is an undeclared identifier and that it is expecting an assignment operator instead of does-not-equal. So I'm not sure if I'm just missing something or if something is going on.

Probably because Netham's example is missing a bracket right after the 'while' declaration line.

Well yes, but no that is not why 'cause I fixed that.

Edit:
Arrow buttons don't return anything.
Also, I don't know why I didn't understand what you guys were trying. I, for whatever reason, thought foo was some command or function or something

@calc84maniac
Ya, in console you do have to press the Enter button. At least using cin you do. I don't know if there is another way or not.

Netham45 · « **Reply #12 on:** September 16, 2011, 07:19:50 pm »

Check out ConIO, it'll let you get scancodes.

http://www.cplusplus.com/forum/beginner/12361/ has some more info on it.

meishe91 · « **Reply #13 on:** September 16, 2011, 07:54:12 pm »

WOO! That was the key right there! Thanks, Netham!

New modified code to work how I originally intended it to:

Code: [Select]

#include <iostream>
#include <iomanip>
#include <conio.h>
using namespace std;
void move(int direction,int &x,int &y)
{
	if(direction==119)
	{
		y-=(y!=1);
	}
	else if(direction==115)
	{
		y+=(y!=11);
	}
	else if(direction==97)
	{
		x-=(x!=1);
	}
	else if(direction==100)
	{
		x+=(x!=11);
	}
	else {;}
	return;
}
void display(int x,int y)
{
	cout<<"*************\n";
	for(int i=0;i<11;i++)
	{
		if(i+1==y)
		{
			cout<<"*"<<setw(x)<<"X"<<setw(13-x)<<"*\n";
		}
		else
		{
			cout<<"*           *\n";
		}
	}
	cout<<"*************\n";
}

int main()
{
	int x=6;
	int y=6;
	int direction=27;
	do
	{
		move(direction,x,y);
		display(x,y);
		direction=getch();
		system("cls");
	}while(direction!=113);
	system("pause");
	return 0;
}

Note:
Normal WASD keys to move. Q to quit.

Goplat · « **Reply #14 on:** September 16, 2011, 09:22:40 pm »

Why did you change the character constants 'w', 's', etc into their much-harder-to-recognize numeric values 119, 115, etc?

Author Topic: Fun Little C++ Pointless Program (Read 7245 times)

meishe91

Fun Little C++ Pointless Program

Ashbad

Re: Fun Little C++ Pointless Program

DrDnar

Re: Fun Little C++ Pointless Program

meishe91

Re: Fun Little C++ Pointless Program

Netham45

Re: Fun Little C++ Pointless Program

DrDnar

Re: Fun Little C++ Pointless Program

calc84maniac

Re: Fun Little C++ Pointless Program

meishe91

Re: Fun Little C++ Pointless Program

DrDnar

Re: Fun Little C++ Pointless Program

Ashbad

Re: Fun Little C++ Pointless Program

calc84maniac

Re: Fun Little C++ Pointless Program

meishe91

Re: Fun Little C++ Pointless Program

Netham45

Re: Fun Little C++ Pointless Program

meishe91

Re: Fun Little C++ Pointless Program

Goplat

Re: Fun Little C++ Pointless Program