Hi all

Here's my test app - I want press a key ,display on screen
but it didn't print right.
Help me please;






//use -lstdc++

#include <stdio.h>
#include <termios.h>
#include <unistd.h>
#include <iostream>

using namespace std;

int mygetch( ) {   // getch()
struct termios oldt,newt;
int ch;
tcgetattr( STDIN_FILENO, &oldt );
newt = oldt;
newt.c_lflag &= ~( ICANON | ECHO );
tcsetattr( STDIN_FILENO, TCSANOW, &newt );
ch = getchar();
tcsetattr( STDIN_FILENO, TCSANOW, &oldt );
return ch;
}

int main(int argc, char *argv[])
{
char ch_;

while(true)
{
ch=mygetch();

printf("%c",&ch_);  // this will always print a blank -- why?
//printf("%d",&ch_); // this will always print -1073744410 -- why?
//std::cout << ch_;   // this will print right char. also, std::cout <<
'\b' will not cause a backspace.

}

}



thank you very much

key9

[ Post a follow-up to this message ]

In article <e4ndgg$rik$1@news.yaako.com>, "key9" <iamkey9@126.com> wrote:

> Here's my test app - I want press a key ,display on screen
> but it didn't print right.
> Help me please;
>
[snip]
>         ch=mygetch();
>
>     printf("%c",&ch_);  // this will always print a blank -- why?
>     //printf("%d",&ch_); // this will always print -1073744410 -- why?

You're giving printf() the address of ch_ instead of its value.

[ Post a follow-up to this message ]

Wayne C. Morris wrote:
> In article <e4ndgg$rik$1@news.yaako.com>, "key9" <iamkey9@126.com> wrote:
>
> 
>
> [snip]
> 
>
>
> You're giving printf() the address of ch_ instead of its value.

Plus: you have two variables, one called "ch", the other "ch_" .

HTH,
AvK

[ Post a follow-up to this message ]

omg.
thank you very much!

[ Post a follow-up to this message ]