Question

Please help! Programming in C code:

Write a function called doubler that is passed the address of a floating-point variable and doubles the value of that original variable. Confirm that the original was doubled by printing its value before and after calling doubler.

Answer 1

what have you tried??

you'll need a float variable : `float var = 0;`

`&var` will give you the address of the memory location where this variable is stored.

when the function call to 'doubler' is made, we pass this address: &var.
>> This is called 'pass by reference', where we pass the memory address of the variable.
`float answer = doubler(&var);`

so your double function definition would look something like this:
`float doubler(float* arg)`
`{`
` return (*arg)*2; //`
`}`

the address of var, is caught in pointer arg.
*arg will give the `value` pointed out by arg.
(*arg)*2 will give the required result which we pass back and will be cause in the float variable 'answer' which you can print.

Give it a try!
ask doubts :)

Answer 2

will be caught** in the float variable

Answer 3

Actually, wouldn't it be:

void doubler( float* arg )
{
*arg *= 2;
}

Answer 4

@rsmith6559 is correct.

Answer 5

oh yeah, we've passed by reference, so we also don't need to catch anything

Answer 6

Hartnn.. you... you code? *mouth drops*

Answer 7

LOL Jay, I code for living :P

Answer 8

WHY DIDNT I KNOW THIS! XD