Need a couple quick questions answered please

[ayndrew]

1.)I'm trying to write code to swap element [2] and element [4] in an array of floats called ARR. I need to declare a simple variable called temp for this question, and assume the array is correctly declared and initialized.

2.)Also how would I write code to copy the 0th element of an array called ARR into all the other elements of the array assuming there are 10 elements in the array.

[kempofighter]

Sounds easy to me. You even explained how to accomplish #1 so you already know how to do it. However, you can let the STL do the work for you. Take a look at the swap, fill, and fill_n algorithms.
http://www.cplusplus.com/reference/algorithm/

[ayndrew]

I actually have no idea what I'm doing. This is all really new to me. How exactly would you write the code?

[Rehan FASTian]

http://libraryofcprograms.blogspot.com/2012/12/function-swap-to-exchange-two-values-by-passing-arguments-by-reference-to-the-function.html

Little modification might be helpful for you. Above link takes you to a program in which values from two variables are swaped. Use array indexes instead of variables and you are done.