What are the advantages and disadvantages of compiling a program in C with saving it in 32 bites or 64 bits ?

Answer 1

Most applications will run in 32-bit mode as they require less than 4GB of RAM (your computer's temporary memory). If you need more than 4GB of RAM for some reason, use a 64-bit Compiler but NOTE 64-bit applications WILL NOT exacute on a 32- bit OS.

Answer 2

thanks.is that all ? any other advantage or disadvantage?

Answer 3

Also 64 bit applications​ will run faster, but require more ram and have a bigger file size.
32 bit will only run on 64 bit OS if the OS is built to handle it.

Answer 4

Those are the main things​. I think 64 bit applications​ can perform operations on 64 bit integers quicker and more efficiently​. There are extra features in the 64 bit instruction set, but you wouldn't​ notice this unless coding in assembly. There is better in built security when compiling to 64 bit.

This talks about some of the security benefits:

https://www.howtogeek.com/56701/htg-explains-whats-the-difference-between-32-bit-and-64-bit-windows-7/