Why do i get an empty output for my code in C++ ?? Where am I mistaken?

    #include <iostream>
using namespace std;

int main(){
    int howMany, num[howMany], max; //defining variables
    
    cout<<"How many numbers do you want to add? (Enter your number and press enter): ";
    cin>>howMany;
    
    for(int i=1;i<=howMany;++i){
        cout<<"Enter you number: ";
        cin>>num[i-1];
    }
    
    max=num[0];
    for (int element:num){
        max=(max>=element)?max:element;
    }
    return 0;   
}

well i actually wanted to find the largest number out of a given set of numbers….
i wanted to take an input from a user on how many numbers he wants to add. then i take all those numbers, for that i made a loop. and then i compare each element of that array of numbers with the previous one to find the largest number. i compiled my code, received no errors….and then when i run it i get an empty output. like this:my output img. please help me out!!!

>Solution :

Disclamer: this is not standard c++

I have tried your code in an online compiler and apart from your how many variable nog being set, there not much wrong. If you just change the order a bit it works

#include <iostream>
using namespace std;

int main(){
int howMany, max; //defining variables

cout<<"How many numbers do you want to add? (Enter your number and press enter): ";
cin>>howMany;
int num[howMany];

for(int i=1;i<=howMany;++i){
    cout<<"Enter you number: ";
    cin>>num[i-1];
}

max=num[0];
for (int element:num){
    max=(max>=element)?max:element;
}
std::cout << max << std::endl; // to output the max
return 0;   

}