矩阵的标量乘法程序

给定一个矩阵和一个标量元素 k，我们的任务是找出该矩阵的标量积。
例子：

Input : mat[][] = {{2, 3}
                   {5, 4}}
        k = 5
Output : 10 15 
         25 20 
We multiply 5 with every element.

Input : 1 2 3 
        4 5 6
        7 8 9
        k = 4
Output :  4 8  12
          16 20 24
          28 32 36

数字 k(scalar) 的标量乘法，将其乘以矩阵中的每个条目。矩阵A是矩阵kA。

C++

// C++ program to find the scalar product
// of a matrix
#include 
using namespace std;
 
// Size of given matrix
#define N 3
 
void scalarProductMat(int mat[][N], int k)
{
    // scalar element is multiplied by the matrix
    for (int i = 0; i < N; i++)
        for (int j = 0; j < N; j++)
            mat[i][j] = mat[i][j] * k;       
}
 
// Driver code
int main()
{
    int mat[N][N] = { { 1, 2, 3 },
                      { 4, 5, 6 },
                      { 7, 8, 9 } };
    int k = 4;
 
    scalarProductMat(mat, k);
 
    // to display the resultant matrix
    printf("Scalar Product Matrix is : \n");
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++)
            printf("%d ", mat[i][j]);
        printf("\n");
    }
 
    return 0;
}

Java

// Java program to find
// the scalar product
// of a matrix
import java.io.*;
 
class GFG {
     
static final int N = 3;
static void scalarProductMat(int mat[][],
                                  int k)
{
     
    // scalar element is multiplied
    // by the matrix
    for (int i = 0; i < N; i++)
        for (int j = 0; j < N; j++)
            mat[i][j] = mat[i][j] * k;
}
 
// Driver code
public static void main (String[] args)
{
    int mat[][] = { { 1, 2, 3 },
                    { 4, 5, 6 },
                    { 7, 8, 9 } };
    int k = 4;
 
    scalarProductMat(mat, k);
 
    // to display the resultant matrix
    System.out.println("Scalar Product Matrix is : ");
     
    for (int i = 0; i < N; i++)
    {
        for (int j = 0; j < N; j++)
            System.out.print(mat[i][j] + " ");
        System.out.println();
    }
}
}
 
// This code is contributed by Ajit.

Python 3

# Python 3 program to find the scalar
# product of a matrix
 
# Size of given matrix
N = 3
 
def scalarProductMat( mat, k):
 
    # scalar element is multiplied
    # by the matrix
    for i in range( N):
        for j in range( N):
            mat[i][j] = mat[i][j] * k    
 
# Driver code
if __name__ == "__main__":
     
    mat = [[ 1, 2, 3 ],
           [ 4, 5, 6 ],
           [ 7, 8, 9 ]]
    k = 4
 
    scalarProductMat(mat, k)
 
    # to display the resultant matrix
    print("Scalar Product Matrix is : ")
    for i in range(N):
        for j in range(N):
            print(mat[i][j], end = " ")
        print()
 
# This code is contributed by ita_c

C#

// C# program to find
// the scalar product
// of a matrix
using System;
 
class GFG{
 
static int N = 3;
static void scalarProductMat(int[,] mat,
                                  int k)
{
     
    // scalar element is multiplied
    // by the matrix
    for (int i = 0; i < N; i++)
        for (int j = 0; j < N; j++)
            mat[i,j] = mat[i, j] * k;    
}
 
// Driver code
static public void Main ()
{
    int[,] mat = {{1, 2, 3},
                  {4, 5, 6},
                  {7, 8, 9}};
    int k = 4;
 
    scalarProductMat(mat, k);
 
    // to display the resultant matrix
    Console.WriteLine("Scalar Product Matrix is : ");
     
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++)
            Console.Write(mat[i, j] + " ");
        Console.WriteLine();
    }
}
}
 
// This code is contributed by Ajit.

PHP


Javascript

输出： Scalar Product Matrix is : 
4 8 12 
16 20 24 
28 32 36