naive way for maximum value

maxvalue.cpp

#include<bits/stdc++.h>
using namespace std;
int maxRange(int *arr,int llimit,int hlimit){
  int max_value = arr[llimit];
  for(int i=llimit;i<hlimit;i++){
    if(max_value<arr[i]) max_value = arr[i];
  }
  return max_value;
}
int main(){
  int arr_value[100000];
    int arr[] = {-1,2,-1,10,30,4};
    int testCase = 1;
    while(testCase--){
        int start,end;
        cin >> start >> end;
        cout << maxRange(arr,start-1,end) << endl;
    }
}