Reputation: 113
I always feel lots of problem while taking char or string inputs in C linux. And see this prog. It's not taking input from the user. Please help.
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
int main()
{
char *buf;
int msglen;
printf("\nEnter message length\t");
scanf("%d",&msglen);
buf=malloc(msglen);
//memset(buf,'\0',msglen+1);
printf("\nEnter data\t");
fflush(stdin);
fgets(buf,msglen,stdin); //NOT WORKING
fputs(buf,stdout);
return 0;
}
Thanks :)
Upvotes: 0
Views: 3807
Reputation: 141648
When you read the integer with scanf("%d"....)
, it does not remove the newline from the input stream. So when you call fgets
later, it reads and finds a newline , i.e. you read a blank line.
To read the next line instead you will need to consume that newline, e.g. getchar()
as someone else suggested.
This sort of issue is common when you mix formatted I/O (scanf
) with unformatted I/O.
Upvotes: 1
Reputation: 1463
fflush()
is used to flush the output streams
and not clear the remaining characters from stdin
. use gets()
or getchar()
first to remove the EOF
from stdin
Upvotes: 2