Finding The Biggest Array Element in C++

#include <iostream>
using namespace std;
int main()
{
    int num;
    float arr[100];
    cout << "Insert the total number of entries (1 to 100): ";
    cin >> num;
    cout << endl;
    for(int x = 0; x < num; ++x)
    {
        cout  << x + 1 << ". ";
        cin >> arr[x];
     }
     for(int x = 1;x < num; ++x)
     {
        if(arr[0] < arr[x]) // for smallest element arr[0] > arr[x]
        arr[0] = arr[x];
     }
     cout << "\nThe largest number is: " << arr[0];
     return 0;
 }

Insert the total number of entries (1 to 100): 4
243.4
567
34.567
563.45 
The largest number is: 567

• User is requested to enter the total number of entries num. The entries are taken from the user and stored in an array arr [x]. x is the number of elements the array contains. The value of x is requested from the user.
• To check for the biggest element, a code is generated so that the first element and the second element of the array are compared.
• The bigger element is stored in arr [0].
• The first element is then compared to the third element. Then the fourth. The process continues until all the elements from first to last have been compared to each other.
• The bigger element throughout the check is stored in arr [0].
• The result is printed on the screen.