Question

explain me how "c++" in this sum become 3. explain clearly.

Answer 1

Listen there is a great difference between + & ++ ; + is just simple addition in this case but c ++ mean that first add then the next time when c is used add again .if you dont understand the above theory look at the example given below eg. Let a be 2 , and b be 5 find c = a++b++a here a is used twice so ur second step will be = (2)+(1) + (5)+(1) + 3 due to the property mentioned above here the second a becomes 3 for the + mentioned earlier should be used . I hope my answer satiafies you dear

Answer 2

Hi,

d = ++c + c++ + 4

To understand what is happening in above line of code first of all you have to learn what is statement.

So what is statement?

Line of code which does something is called statement.

What we are doing in that line/statement?

We are assigning calculated result of "++c + c++ + 4" to "d" variable.

What is the link of "++c" and "c++" with statement?

First of all look at this line carefully

d = (++c) + c++ + 4

i put parenthesis around "++c" because this will get calculated before whole statement

notice that i haven't put any parenthesis around "c++" because...

"++c" will be calculated before execution of statement and "c++" will be calculated

after execution of statement.

So now you know the difference of "++c" and "c++" (i hope so)

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let's understand it by looking into the value of "c" variable in program

=> given: c = 2

so "c" variable is containing the 2, c variable is pointing to a memory location which contains number 2

during execution of program below line will be executed

d = ++c + c++ + 4

so you already know that "++c" will be calculated before execution of statement

so now that statement will look like below

d = 3 + 3++ + 4

and remember now c variable is pointing to memory location which contains number 3

on next step 3 + (3++) + 4 will be calculated to number 10 but program will still remember that he has

to calculate the value of "3++"

so the variable "d" will be equals to 10, but after execution of statement c variable will be 4