hello everyone,
I have a program below :
What I saw when this program runs is that characters input are not printed at the same time as is clear from the while loop.Code:#include<stdio.h> #include<stdlib.h> int main() { int i; while((i=getchar())!=EOF) { printf("%c ",i); } system("pause"); }
What I want is that characters should be printed as soon as it is entered.
Can u tell me some solution to it ???????
1. Read the intro threads - you'll learn about such things as code tags - fixed
2. Pay attention to the forum you post in - this is C, and you posted in C++ - also fixed.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
Input and output (to stdout) are buffered by default.
The characters are normally echoed, meaning that you see what you print. Don't know what you mean with your question.
You should actually get double the input you post. One for the echo and one from printf().
What do you get exactly?
Originally Posted by sanjay.nitk
As far as i understood ur problem statmnt, this is what i think you wanted..Code:#include<stdio.h> int main() { char ch,choice; int val=0; clrscr(); while(val) { printf("\nenter the char\n"); ch=getche(); //get the char from user putch(ch); //immediately display that char printf("\nwant to continue..?(Y/N)\n"); choice=getche(); if(choice=='y' || choice=='Y') val=1; else val=0; } return 0; }
Last edited by shrikanth; 08-11-2010 at 01:31 PM.
Do not use void main! SourceForge.net: Void main - cpwiki
Furthermore, you are using val without initializing it.
You are also too trigger happy in using non-standard constructs. Avoid getche at least. Use the standard getchar.
Last edited by Elysia; 08-11-2010 at 12:34 PM.
Here's a good K&R example.
This is a timeless classic, IMO.Code:#include <stdio.h> int main() { int x; while ((x = getchar()) != EOF) putchar(x); return 0; }
Babkockdood: notice that your example is similiar to sanjay.nitk's code, except that it is simplified and uses putchar instead of printf, but that makes no real difference in this case (i.e., sanjay.nitk's observation will remain essentially the same).
Look up a C++ Reference and learn How To Ask Questions The Smart Way
Elysia: thanks for ur advice on using void and usin uninitialized vars, i'l keep these in mind..
But i couldn't use getchar and immediately print d char entered as sanjay.nitk wanted.. anyway i'l try again.. and what is the problem with getche()..?
getche is not a standard C function. Therefore, it would be best to avoid if there is no absolute need. You should just keep that in mind.
