include/06.keyboard/keyboard10.c


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void keyup()
{
    if(buffer_current>0)
    {
	buffer_size[buffer_current]=buffer_index;
	for(size_t i=0;i<buffer_index;i++) deletelast();
	buffer_current--;
	buffer_index=buffer_size[buffer_current];
	printf("%s",buffer[buffer_current]);
    }
}