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1. Strive for consistency consistent
sequences of actions should be required
in similar situations.
2. Enable frequent users to use shortcuts –
to increase the pace of interaction use
abbreviations, special keys, hidden
commands, and macros.
3. Offer informative feedback – for every
user action, the system should respond
in some way.
4. Design dialogs to yield closure –
Sequences of actions should be
organized into groups with a beginning,
middle, and end.
5. Offer error prevention and simple error
handling – design the form so that users
cannot make a serious error; for
example, prefer menu selection to form
fill-in and do not allow alphabetic
characters in numeric entry fields.
6. Permit easy reversal of actions - Allow a
user reverse any action he/she has taken.
This facilitates faster recovery from
certain errors.
7. Support internal locus of control –
Experienced users want to be in charge.
Surprising system actions, tedious
sequences of data entries, inability or
difficulty in obtaining necessary
information, and inability to produce the
action desired all build anxiety and
dissatisfaction.
8. Reduce short-term memory load – A
famous study suggests that humans can
store only 7 (plus or minus 2) pieces of
information in their short term memory.
You can reduce short term memory load
by designing screens where options are
clearly visible, or using pull-down
menus and icons.
9. Prevent Errors - prevent errors
whenever possible. Steps can be taken to
design so that errors are less likely to
occur, using methods such as organizing
screens and menus functionally,
designing screens to be distinctive and
making it difficult for users to commit
irreversible actions.
Moraa orina answered the question on June 13, 2018 at 18:17
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int x, y, z;
three_(int i, int j, int k)
{
x = i; y = j; z = k; }
three_() {x=0; y=0; z=0; }
void get(in int &j, int &k){
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};
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Date posted: June 8, 2018. Answers (1)
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int size;
public:
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fill in all the details that will create a...(Solved)
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int *p;
int size;
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int get(int i);
//create operator=( function
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