find all elements that can be devided with 5

i need to write function that takes one matrix and find all elements can be devided with 5 and replaces them with 5. in c++ for this problem you can write something like this if(a%5==0) a=5 thanks in advance

Answer 1

[Adam]

a( rem(a,5) == 0 ) = 5;

[Etan Cole]

thanks man very fast you have been of much help.