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Full Discussion: Clear standard input buffer for C program in Linux
Top Forums Programming Clear standard input buffer for C program in Linux Post 302912420 by Abhishek_kumar on Friday 8th of August 2014 05:48:55 AM
Old 08-08-2014
Ubuntu Clear standard input buffer for C program in Linux
Hello friends! i am writing a code in which i take inputs (numbers) from user and count the total number of positive, negative and zeros entered. I need to clear my standard input buffer before scanf() command. My compiler is completely ignoring the fflush(stdin) command. its not even showing any error!. I am using Linux(ubunto) platform. Help!
Code:
#include<stdio.h>
int main()
{
	int pos=0,neg=0,zeros=0;
	float num;
	char ans='y';
	while(ans=='y')
	{
		printf("Enter a number : ");
		scanf("%f",&num);
		if(num>0)
		{
			pos++;
		}
		else if(num<0)
		{
			neg++;
		}		
		else
		{
			zeros++;
		}		
		
		printf("Wanna enter another number ? (y/n)\n");
		fflush(stdin);			
		scanf("%c",&ans);			
		if(ans=='n')
		{
		printf("positive number : %d \n Negative numbers : %d \n Zeros : %d",pos,neg,zeros);
		}

	}
return 0;
}

Last edited by Abhishek_kumar; 08-08-2014 at 02:27 PM..
 

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LEARN ABOUT SUNOS

acctmerg

acctmerg(1M)						  System Administration Commands					      acctmerg(1M)

NAME

       acctmerg - merge or add total accounting files

SYNOPSIS

       /usr/lib/acct/acctmerg [-a] [-i] [-p] [-t] [-u] [-v] [filename] ...

DESCRIPTION

       acctmerg reads its standard input and up to nine additional files, all in the tacct format (see acct.h(3HEAD)) or an ASCII version thereof.
       It merges these inputs by adding records whose keys (normally user ID and name) are identical, and expects the inputs to be sorted on those
       keys.

OPTIONS

       -a	Produce output in ASCII version of tacct.

       -i	Produce input in ASCII version of tacct.

       -p	Print input with no processing.

       -t	Produce a single record that totals all input.

       -u	Summarize by user ID, rather than by user ID and name.

       -v	Produce output in verbose ASCII format, with more precise notation for floating-point numbers.

EXAMPLES

       Example 1: Using the acctmerg command.

       The following sequence is useful for making "repairs" to any file kept in this format:

       example% acctmerg -v <filename1>filename2

       Edit filename2 as you want:

       example% acctmerg -i <filename2>filename1

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWaccu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       acctcom(1),  acct(1M),  acctcms(1M),  acctcon(1M),  acctprc(1M),  acctsh(1M),  fwtmp(1M),  runacct(1M),	acct(2),  acct.h(3HEAD), utmpx(4),
       attributes(5)

       System Administration Guide: Basic Administration

SunOS 5.10							    22 Feb 1999 						      acctmerg(1M)
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