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scanf conflicting characters remain in the input stream

hello, there's a little problem with the scanf-function. My program

...
 scanf("%u",&A);
...

expects a unsigned integer. But when someone hits a unwanted character, scanf terminates. Any conflicting character remain in the input stream. How to clear the scanf-input-stream? Is there a known workaround for ARM7 ADuC7026)? In C51 you just

CLR ?C?charloaded
RET

But how on ARM7? Thanks for advice :-)

Parents

0 Georg Bunter over 19 years ago

Now i have a little workaround.
Maybe it is helpful for some user.

	while(1)
	{
		printf("Enter your personal secret Hex-key!\n");
		if (scanf("%X",&A)) break;
		scanf("%*");				//Clearing scanf input stream
	}

:-)

Reply

0 Georg Bunter over 19 years ago

Now i have a little workaround.
Maybe it is helpful for some user.

	while(1)
	{
		printf("Enter your personal secret Hex-key!\n");
		if (scanf("%X",&A)) break;
		scanf("%*");				//Clearing scanf input stream
	}

:-)

Children

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