C++ Clan

We can use functions by 2 methods of input:

• input as passing arguments by values [Part 1;]
• input as passing arguments by reference [Part 2;]

• In this type, we give function the value of a variable not that variable...!!!
• Function creates a local scope variable (local to the functions body only)
• It does not change the value of original variable.
• Say we ran an square function which takes argument by value and argument is x
• When function is called it reserves  memory of ram and makes a copy of value of x and runs operations on this copy
• In the end when it returns value then function is removed from memory so is that copy of variable
• Original variable remains intact
• This is how scope of variable is defined

Problem 2; returning complex values

Say we have to make a function which takes 5 variables and returns separate value

How to return this: compare those variables for largest one? Obviously we can't return this:

return if (num1>num2&&num1>num3){num1}; and if we have to put all five variables confirmation statements?

Here is a tip: make a local scope variable which will collect all those values which has to be returned in the end i.e.

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int result; //this variable only exists while function is working when it is done this variable                                        

                     will be removed so it is a local variable to this function only / must not match existing one

if (num1>num2&&num1>num3){result=num1;}

if (num2>num3){result=num2;}

else {result=num3;}

return result;

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Very easy!

Now every time you can just create your required variable and save returning values in it and return it easily....!!!!

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Till next time.. Please let me know your problem with syntax or logic or error so i can make better understanding in the article...!!!
Do comment in section below :)