Note taking in EGR115. notebook slide number in margin. comments on the right. write down vocabulary words write down overall ideas write down things that we repeat 4 or 5 times! write down possible errors printout of slides print 2 or 3 slides per page draw arrows, add your comments
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History of computers (4 slides)
What is a computer system?
What is software?
What is programming?
Compiled vs. interpreted
Computers ≠ calculators
Computers are programmable. The first calculators were not programmable, hence not considered computers.
Babbage’s difference engine
Device to subtract adjacent valuesin a column of numbers. Created for engineers in charge of creating tables of logarithms and trigonometric functions.
‘Zsszbjzs 9599’ would be
‘Attack at 0600’
CPU + memory
( ) ‘ ’ , ;
if for else while switch case otherwise end input fprintf
1) Machine language – also
called binary language.
Sequence of 0’s and 1’s.
2) Assembly language – each line of code produces a single machine instruction (add, subtract…)
3) High-level language – slightly closer to spoken languages.
a= a + b + c;
This line does the same as the two above.