查找矩阵中每一行的最大元素

给定一个矩阵，任务是找到每一行的最大元素。

例子：

Input :  [1, 2, 3]
         [1, 4, 9]
         [76, 34, 21]

Output :
3
9
76

Input : [1, 2, 3, 21]
        [12, 1, 65, 9]
        [1, 56, 34, 2]
Output :
21
65
56

方法：方法非常简单。这个想法是为no_of_rows运行循环。检查行内的每个元素，并找到最大元素。最后，打印元素。下面是实现：

C++

// C++ program to find maximum 
// element of each row in a matrix
#include
using namespace std;
const int N = 4; 
  
  
    // Print array element
    void printArray(int result[], int no_of_rows) {
        for (int i = 0; i < no_of_rows; i++) {
            cout<< result[i]<<"\n";
        }
  
    }
  
    // Function to get max element
    void maxelement(int no_of_rows, int arr[][N]) {
        int i = 0;
          
        // Initialize max to 0 at beginning
        // of finding max element of each row
        int max = 0;
        int result[no_of_rows];
        while (i < no_of_rows) {
            for (int j = 0; j < N; j++) {
                if (arr[i][j] > max) {
                    max = arr[i][j];
                }
            }
            result[i] = max;
            max = 0;
            i++;
  
        }
        printArray(result,no_of_rows);
  
    }
  
    // Driver code
    int main()
    {
        int arr[][N] = { {3, 4, 1, 8},
                        {1, 4, 9, 11},
                        {76, 34, 21, 1},
                        {2, 1, 4, 5} };
    // Calling the function 
        maxelement(4, arr);
    }
  
// This code is contributed by Rajput-Ji

Java

// Java program to find maximum 
// element of each row in a matrix
public class GFG{
  
    // Function to get max element
    public static void maxelement(int no_of_rows, int[][] arr) {
        int i = 0;
          
        // Initialize max to 0 at beginning
        // of finding max element of each row
        int max = 0;
        int[] result = new int[no_of_rows];
        while (i < no_of_rows) {
            for (int j = 0; j < arr[i].length; j++) {
                if (arr[i][j] > max) {
                    max = arr[i][j];
                }
            }
            result[i] = max;
            max =0;
            i++;
  
        }
        printArray(result);
  
    }
  
    // Print array element
    private static void printArray(int[] result) {
        for (int i =0; i

---

Python

# Python program to find maximum 
# element of each row in a matrix
  
# importing numpy
import numpy
  
# Function to get max element
def maxelement(arr):
      
    # get number of rows and columns
    no_of_rows = len(arr)
    no_of_column = len(arr[0])
      
    for i in range(no_of_rows):
          
        # Initialize max1 to 0 at beginning
        # of finding max element of each row
        max1 = 0
        for j in range(no_of_column):
            if arr[i][j] > max1 :
                max1 = arr[i][j]
                  
        # print maximum element of each row
        print(max1)
  
# Driver Code
arr = [[3, 4, 1, 8],
       [1, 4, 9, 11],
       [76, 34, 21, 1],
       [2, 1, 4, 5]]
  
# Calling the function        
maxelement(arr)

C#

// C# program to find maximum 
// element of each row in a matrix 
using System;
  
class GFG
{
  
// Function to get max element 
public static void maxelement(int no_of_rows, 
                              int[][] arr)
{
    int i = 0;
  
    // Initialize max to 0 at beginning 
    // of finding max element of each row 
    int max = 0;
    int[] result = new int[no_of_rows];
    while (i < no_of_rows)
    {
        for (int j = 0; 
                 j < arr[i].Length; j++)
        {
            if (arr[i][j] > max)
            {
                max = arr[i][j];
            }
        }
        result[i] = max;
        max = 0;
        i++;
  
    }
    printArray(result);
  
}
  
// Print array element 
private static void printArray(int[] result)
{
    for (int i = 0; i < result.Length;i++)
    {
        Console.WriteLine(result[i]);
    }
  
}
  
// Driver code 
public static void Main(string[] args)
{
    int[][] arr = new int[][]
    {
        new int[] {3, 4, 1, 8},
        new int[] {1, 4, 9, 11},
        new int[] {76, 34, 21, 1},
        new int[] {2, 1, 4, 5}
    };
      
    // Calling the function 
    maxelement(4, arr);
}
}
  
// This code is contributed by Shrikant13

PHP

 $max) 
            {
                $max = $arr[$i][$j];
            }
        }
        $result[$i] = $max;
        $max = 0;
        $i++;
  
    }
    printArray($result,$no_of_rows);
  
}
  
// Driver code
$arr = array(array(3, 4, 1, 8),
                array(1, 4, 9, 11),
                array(76, 34, 21, 1),
                array(2, 1, 4, 5));
// Calling the function 
maxelement(4, $arr);
  
// This code is contributed by mits
?>

输出 ：

8
11
76
5