find maximum un array c++ code example

Example 1: how to get the largest number in a c++ array

#include <iostream>
using namespace std;
int main(){
   //n is the number of elements in the array
   int n, largest;
   int num[50];
   cout<<"Enter number of elements you want to enter: ";
   cin>>n;
   
   /* Loop runs from o to n, in such a way that first
    * element entered by user is stored in num[0], second 
    * in num[1] and so on. 
    */
   for(int i = 0; i < n; i++) {
      cout<<"Enter Element "<<(i+1)<< ": ";
      cin>>num[i];
   }
   // Storing first array element in "largest" variable
   largest = num[0];
   for(int i = 1;i < n; i++) {
      /* We are comparing largest variable with every element
       * of array. If there is an element which is greater than
       * largest variable value then we are copying that variable
       * to largest, this way we have the largest element copied
       * to the variable named "largest" at the end of the loop 
       *
       */
      if(largest < num[i])
         largest = num[i];
   } 
   cout<<"Largest element in array is: "<<largest;
   return 0;
}

Example 2: find min and max in array c++

#include<iostream>

using namespace std;

public void getMax_MinValue(int arr[])
{
    int max, min;

    max = arr[0];
    min = arr[0];
    for (int i = 0; i < sizeof(arr); i++)
    {
        if (max < arr[i])
            max = arr[i];
        else if (min > arr[i])
            min = arr[i];
    }

    cout << "Largest element : " << max;
    cout << "Smallest element : " << min;
 
}