Mixing
Strange output behaviour when using system(“/bin/stty raw”)
In my program, a 5x20 field of points is displayed. A player which has the symbol "#" is also on the field. You can move the player around with w, a, s and d. If I use buffered input everything is fine. But the user dont want hit enter every time. So I used the command
system("/bin/stty raw")
The problem now is that the output behavior is very strange. The lines of the field are not displayed properly now. I wasted much time by trying to find the error by myself. Also Google seems not to have an appropriate explanation to this behavior.
Can you tell me why the program behaves that strange, and how to fix that?
#include <stdio.h>
#define FIELD_VERTIKAL 5
#define FIELD_HORIZONTAL 20
#define PLAYER_SYMBOL '#'
void print_field(char field[FIELD_VERTIKAL][FIELD_HORIZONTAL])
{
// reset display
for (int i = 0; i < 20; i++)
putchar('n');
// display field
for (int i = 0; i < FIELD_VERTIKAL; i++)
{
for (int j = 0; j < FIELD_HORIZONTAL; j++)
putchar(field[i][j]);
putchar('n');
}
}
void draw_field(char field[FIELD_VERTIKAL][FIELD_HORIZONTAL],
int pos_vertikal, int pos_horizontal)
{
for (int i = 0; i < FIELD_VERTIKAL; i++)
for (int j = 0; j < FIELD_HORIZONTAL; j++)
field[i][j] = '.';
field[pos_vertikal][pos_horizontal] = '#';
}
int main()
{
// create field and initialize it
char field[FIELD_VERTIKAL][FIELD_HORIZONTAL];
// position of player
int pos_vertikal = 0;
int pos_horizontal = 0;
// initialize field
draw_field(field, pos_vertikal, pos_horizontal);
system("/bin/stty raw");
print_field(field);
char input;
while ((input = getchar()) != EOF)
{
// move player
if (input == 'w')
{
pos_vertikal--;
}
else if (input == 'a')
{
pos_horizontal--;
}
else if (input == 's')
{
pos_vertikal++;
}
else if (input == 'd')
{
pos_horizontal++;
}
// place player and display field
draw_field(field, pos_vertikal, pos_horizontal);
print_field(field);
}
}
c
asked Jan 2 at 7:51
VengeancosVengeancos
124
add a comment |
In my program, a 5x20 field of points is displayed. A player which has the symbol "#" is also on the field. You can move the player around with w, a, s and d. If I use buffered input everything is fine. But the user dont want hit enter every time. So I used the command
system("/bin/stty raw")
The problem now is that the output behavior is very strange. The lines of the field are not displayed properly now. I wasted much time by trying to find the error by myself. Also Google seems not to have an appropriate explanation to this behavior.
Can you tell me why the program behaves that strange, and how to fix that?
#include <stdio.h>
#define FIELD_VERTIKAL 5
#define FIELD_HORIZONTAL 20
#define PLAYER_SYMBOL '#'
void print_field(char field[FIELD_VERTIKAL][FIELD_HORIZONTAL])
{
// reset display
for (int i = 0; i < 20; i++)
putchar('n');
// display field
for (int i = 0; i < FIELD_VERTIKAL; i++)
{
for (int j = 0; j < FIELD_HORIZONTAL; j++)
putchar(field[i][j]);
putchar('n');
}
}
void draw_field(char field[FIELD_VERTIKAL][FIELD_HORIZONTAL],
int pos_vertikal, int pos_horizontal)
{
for (int i = 0; i < FIELD_VERTIKAL; i++)
for (int j = 0; j < FIELD_HORIZONTAL; j++)
field[i][j] = '.';
field[pos_vertikal][pos_horizontal] = '#';
}
int main()
{
// create field and initialize it
char field[FIELD_VERTIKAL][FIELD_HORIZONTAL];
// position of player
int pos_vertikal = 0;
int pos_horizontal = 0;
// initialize field
draw_field(field, pos_vertikal, pos_horizontal);
system("/bin/stty raw");
print_field(field);
char input;
while ((input = getchar()) != EOF)
{
// move player
if (input == 'w')
{
pos_vertikal--;
}
else if (input == 'a')
{
pos_horizontal--;
}
else if (input == 's')
{
pos_vertikal++;
}
else if (input == 'd')
{
pos_horizontal++;
}
// place player and display field
draw_field(field, pos_vertikal, pos_horizontal);
print_field(field);
}
}
c
asked Jan 2 at 7:51
VengeancosVengeancos
124
add a comment |
In my program, a 5x20 field of points is displayed. A player which has the symbol "#" is also on the field. You can move the player around with w, a, s and d. If I use buffered input everything is fine. But the user dont want hit enter every time. So I used the command
system("/bin/stty raw")
The problem now is that the output behavior is very strange. The lines of the field are not displayed properly now. I wasted much time by trying to find the error by myself. Also Google seems not to have an appropriate explanation to this behavior.
Can you tell me why the program behaves that strange, and how to fix that?
#include <stdio.h>
#define FIELD_VERTIKAL 5
#define FIELD_HORIZONTAL 20
#define PLAYER_SYMBOL '#'
void print_field(char field[FIELD_VERTIKAL][FIELD_HORIZONTAL])
{
// reset display
for (int i = 0; i < 20; i++)
putchar('n');
// display field
for (int i = 0; i < FIELD_VERTIKAL; i++)
{
for (int j = 0; j < FIELD_HORIZONTAL; j++)
putchar(field[i][j]);
putchar('n');
}
}
void draw_field(char field[FIELD_VERTIKAL][FIELD_HORIZONTAL],
int pos_vertikal, int pos_horizontal)
{
for (int i = 0; i < FIELD_VERTIKAL; i++)
for (int j = 0; j < FIELD_HORIZONTAL; j++)
field[i][j] = '.';
field[pos_vertikal][pos_horizontal] = '#';
}
int main()
{
// create field and initialize it
char field[FIELD_VERTIKAL][FIELD_HORIZONTAL];
// position of player
int pos_vertikal = 0;
int pos_horizontal = 0;
// initialize field
draw_field(field, pos_vertikal, pos_horizontal);
system("/bin/stty raw");
print_field(field);
char input;
while ((input = getchar()) != EOF)
{
// move player
if (input == 'w')
{
pos_vertikal--;
}
else if (input == 'a')
{
pos_horizontal--;
}
else if (input == 's')
{
pos_vertikal++;
}
else if (input == 'd')
{
pos_horizontal++;
}
// place player and display field
draw_field(field, pos_vertikal, pos_horizontal);
print_field(field);
}
}
c
asked Jan 2 at 7:51
VengeancosVengeancos
124
In my program, a 5x20 field of points is displayed. A player which has the symbol "#" is also on the field. You can move the player around with w, a, s and d. If I use buffered input everything is fine. But the user dont want hit enter every time. So I used the command
system("/bin/stty raw")
The problem now is that the output behavior is very strange. The lines of the field are not displayed properly now. I wasted much time by trying to find the error by myself. Also Google seems not to have an appropriate explanation to this behavior.
Can you tell me why the program behaves that strange, and how to fix that?
#include <stdio.h>
#define FIELD_VERTIKAL 5
#define FIELD_HORIZONTAL 20
#define PLAYER_SYMBOL '#'
void print_field(char field[FIELD_VERTIKAL][FIELD_HORIZONTAL])
{
// reset display
for (int i = 0; i < 20; i++)
putchar('n');
// display field
for (int i = 0; i < FIELD_VERTIKAL; i++)
{
for (int j = 0; j < FIELD_HORIZONTAL; j++)
putchar(field[i][j]);
putchar('n');
}
}
void draw_field(char field[FIELD_VERTIKAL][FIELD_HORIZONTAL],
int pos_vertikal, int pos_horizontal)
{
for (int i = 0; i < FIELD_VERTIKAL; i++)
for (int j = 0; j < FIELD_HORIZONTAL; j++)
field[i][j] = '.';
field[pos_vertikal][pos_horizontal] = '#';
}
int main()
{
// create field and initialize it
char field[FIELD_VERTIKAL][FIELD_HORIZONTAL];
// position of player
int pos_vertikal = 0;
int pos_horizontal = 0;
// initialize field
draw_field(field, pos_vertikal, pos_horizontal);
system("/bin/stty raw");
print_field(field);
char input;
while ((input = getchar()) != EOF)
{
// move player
if (input == 'w')
{
pos_vertikal--;
}
else if (input == 'a')
{
pos_horizontal--;
}
else if (input == 's')
{
pos_vertikal++;
}
else if (input == 'd')
{
pos_horizontal++;
}
// place player and display field
draw_field(field, pos_vertikal, pos_horizontal);
print_field(field);
}
}
c
c
asked Jan 2 at 7:51
VengeancosVengeancos
124
asked Jan 2 at 7:51
VengeancosVengeancos
124
edited Jan 2 at 11:26
Vengeancos
asked Jan 2 at 7:51
VengeancosVengeancos
124
asked Jan 2 at 7:51
VengeancosVengeancos
124
asked Jan 2 at 7:51
VengeancosVengeancos
124
124
add a comment |
add a comment |
1 Answer
1
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Terminals were very complex devices (and today's terminal emulators are trying to mimic them, something like the VT100; of course these emulators are operating-system specific). Read the TTY demystified page and termios(3). Be also aware of ANSI escape codes.
And stty raw is not doing what you dream of (it is related to the line discipline). See also stty(1) and pty(7).
If you want to write a terminal text oriented application, use some library such as ncurses. So throw your code away, spend a few days reading documentation, and write your code again from scratch.
Maybe you could consider making instead your game some graphical application, e.g. by using some toolkit such as GTK or libSDL.
PS. You don't mention it, but I guess you are using some Linux system.
answered Jan 2 at 7:59
Basile StarynkevitchBasile Starynkevitch
179k13173374
Yes, I use Lubuntu 16.04 (32 Bit).
– Vengeancos
Jan 2 at 17:18
add a comment |
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1 Answer
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active
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Terminals were very complex devices (and today's terminal emulators are trying to mimic them, something like the VT100; of course these emulators are operating-system specific). Read the TTY demystified page and termios(3). Be also aware of ANSI escape codes.
And stty raw is not doing what you dream of (it is related to the line discipline). See also stty(1) and pty(7).
If you want to write a terminal text oriented application, use some library such as ncurses. So throw your code away, spend a few days reading documentation, and write your code again from scratch.
Maybe you could consider making instead your game some graphical application, e.g. by using some toolkit such as GTK or libSDL.
PS. You don't mention it, but I guess you are using some Linux system.
answered Jan 2 at 7:59
Basile StarynkevitchBasile Starynkevitch
179k13173374
Yes, I use Lubuntu 16.04 (32 Bit).
– Vengeancos
Jan 2 at 17:18
add a comment |
Terminals were very complex devices (and today's terminal emulators are trying to mimic them, something like the VT100; of course these emulators are operating-system specific). Read the TTY demystified page and termios(3). Be also aware of ANSI escape codes.
And stty raw is not doing what you dream of (it is related to the line discipline). See also stty(1) and pty(7).
If you want to write a terminal text oriented application, use some library such as ncurses. So throw your code away, spend a few days reading documentation, and write your code again from scratch.
Maybe you could consider making instead your game some graphical application, e.g. by using some toolkit such as GTK or libSDL.
PS. You don't mention it, but I guess you are using some Linux system.
answered Jan 2 at 7:59
Basile StarynkevitchBasile Starynkevitch
179k13173374
Yes, I use Lubuntu 16.04 (32 Bit).
– Vengeancos
Jan 2 at 17:18
add a comment |
Terminals were very complex devices (and today's terminal emulators are trying to mimic them, something like the VT100; of course these emulators are operating-system specific). Read the TTY demystified page and termios(3). Be also aware of ANSI escape codes.
And stty raw is not doing what you dream of (it is related to the line discipline). See also stty(1) and pty(7).
If you want to write a terminal text oriented application, use some library such as ncurses. So throw your code away, spend a few days reading documentation, and write your code again from scratch.
Maybe you could consider making instead your game some graphical application, e.g. by using some toolkit such as GTK or libSDL.
PS. You don't mention it, but I guess you are using some Linux system.
answered Jan 2 at 7:59
Basile StarynkevitchBasile Starynkevitch
179k13173374
Terminals were very complex devices (and today's terminal emulators are trying to mimic them, something like the VT100; of course these emulators are operating-system specific). Read the TTY demystified page and termios(3). Be also aware of ANSI escape codes.
And stty raw is not doing what you dream of (it is related to the line discipline). See also stty(1) and pty(7).
If you want to write a terminal text oriented application, use some library such as ncurses. So throw your code away, spend a few days reading documentation, and write your code again from scratch.
Maybe you could consider making instead your game some graphical application, e.g. by using some toolkit such as GTK or libSDL.
PS. You don't mention it, but I guess you are using some Linux system.
answered Jan 2 at 7:59
Basile StarynkevitchBasile Starynkevitch
179k13173374
edited Jan 2 at 8:11
answered Jan 2 at 7:59
Basile StarynkevitchBasile Starynkevitch
179k13173374
answered Jan 2 at 7:59
Basile StarynkevitchBasile Starynkevitch
179k13173374
answered Jan 2 at 7:59
Basile StarynkevitchBasile Starynkevitch
179k13173374
179k13173374
Yes, I use Lubuntu 16.04 (32 Bit).
– Vengeancos
Jan 2 at 17:18
add a comment |
Yes, I use Lubuntu 16.04 (32 Bit).
– Vengeancos
Jan 2 at 17:18
Yes, I use Lubuntu 16.04 (32 Bit).
– Vengeancos
Jan 2 at 17:18
Yes, I use Lubuntu 16.04 (32 Bit).
– Vengeancos
Jan 2 at 17:18
add a comment |
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