Notesale: Turn your study into money

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Chapter 2
Write Your First Program in C++
This is the 2nd lecture of our DSA series
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This is how the
compilation process work So it is compiler which makes it possible for
us to run a source code
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Courses are available in both Hindi and
English
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There are
many IDEs out there - CodeBlocks, VsCode and many more - which you
don't even need to install Replit is one of them
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In C++, many namespaces are there
which have cout functions in them so if we want to use cout , we have
to add this file to our code
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If you will use > > by mistake by mistake, then it
will give you compilation error So we use this operator to display
output
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Whenever you
have to story any information or data in the memory
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For
eg- int a = 5, a is a variable in memory which is of int type and it has
value 5 in it
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There is a function named sizeof , which will tell you
about the space being used by any variable
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We have a way to story multiple
characters but we will see that in upcoming lectures
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We will just

store binary form of ASCII value of any character
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This
process of converting one data type into another is known as type
casting
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Let 's say the number is -5 1st - Ignore the negative sign 2nd Convert into binary representation = 101 3rd - Take 2 's complement
and store it Now we can store negative numbers simply too, by just
using their first bit as their sign
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2/5 will give 0 and not 0
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To get answer in
float, store it in a float variable
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logical
operators have & & and & is used to check multiple conditions
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We know what things to keep in
mind while dividing , how to store negative numbers & & operators and
! operators
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We will do
Bitwise operators later

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