I am writing a program for Fibonacci number using Dynamic Programming and wants to initialize all the elements of my memo array with -1, how can i do it? and yeah i am using C and C++ so answers for both the languages would be most welcomed.
let say your array is memo[n];
dont forget to include <string.h>
You could just iterate over and set all the elements to -1.
If you want to use memset, here is the syntax for the same :
memset(ArrayName, initial_value, sizeof(ArrayName))
Hi Guys i refer few resources about array.I hope it will help you
Memsetting an array to fill it with a certain value is almost always a bad idea, if you’re not familiar with binary representations and how to handle it. It might work with 0 or -1, but it certainly does not do what you expect to do (or what the people in these comments suggest). My adivce, use std::fill or just a for loop.
memset is a very unstable function, often leading to Junk values being filled. Use a for loop, it will almost never affect the running time of your algorithm.
Suppose you want to do it before all statements in main function.
if you want to do after statements —
then fill_n(array,N) after you declare array.