getchar() running to infinte loop,its not responding when i run it.

[keethi2]

Hi,

I'm using getchar() in qt-creator4 on linux-platform.Its going to an infinte loop,im not even able to enter the character,the system hangs so i force quit.Could someone please help me,how i can use getchar() in qt-creator4 on linux ?

sample code:

#include <iostream>
  #include <stdio.h>
 
  int main()
  {
    char ch;
    printf( "Enter a character : ");
    ch=getchar();
    printf("Char is %c \n",ch);
    return 0; 
   }

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

  int main()
  {
    char ch;
    printf( "Enter a character : ");
    ch=getchar();
    printf("Char is %c \n",ch);
    return 0; 
   }

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Actually i'm supposed to use getch(),but since getch() is not available in linux.I had to use getchar(). It would great ,if anyone could suggest me how i
can use getch() in linux ? Along with the solution to the above problem.

Thanks,
Keerthi

[wysota]

Nothing hangs, press enter/return. And when the program exits, type in "man getchar" and press enter again and start reading.

[ChrisW67]

Actually i'm supposed to use getch(),but since getch() is not available in linux.

I think you are mistaken:

$ man getch
curs_getch(3X)                                                                             curs_getch(3X)
 
NAME
       getch, wgetch, mvgetch, mvwgetch, ungetch, has_key - get (or push back) characters from curses
       terminal keyboard
...

$ man getch
curs_getch(3X)                                                                             curs_getch(3X)

NAME
       getch, wgetch, mvgetch, mvwgetch, ungetch, has_key - get (or push back) characters from curses
       terminal keyboard
...

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You need to include the relevant curses header, initialise and cleanup curses, and link the curses library.

If you intend turning this into a program that uses Qt then you almost certainly don't want either function.