Java program to perform matrix multiplication

public class matrixmultiplication
{
int a[][]={{1,2,3},{2,1,0},{0,1,2}};
int b[][]={{2,2,2},{1,0,1},{1,1,1}};
int prdt[][];
matrixmultiplication()
{
prdt=new int[3][3];
}
void findproduct()
{
for(int i=0;i<3;i++)
for(int j=0;j<3;j++)
for(int k=0;k<3;k++)
{
prdt[i][j]+=a[i][k]*b[k][j];
}
}
void product()
{
for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++)
System.out.print(prdt[i][j]+" ");
System.out.println("\n");
}
}
void display1()
{
for(int i=0;i<3;i++)
  {
   for(int j=0;j<3;j++)
        System.out.print(a[i][j]+" ");
     System.out.println("\n");
  }
}
void display2()
{
for(int i=0;i<3;i++)
  {
   for(int j=0;j<3;j++)
        System.out.print(b[i][j]+" ");
     System.out.println("\n");
  }
}
public static void main(String[] args)
{
matrixmultiplication m= new matrixmultiplication();
m.display1();
System.out.println("\n");
m.display2();
m.findproduct();
System.out.println("\n");
m.product();
}
}

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Matrix addition

#include<stdio.h>
void main()
{
int a[10][10],b[10][10],c[10][10],i,j,row,col;
clrscr();
printf("How many rows : ");
scanf("%d",&row);
printf("How many columns : ");
scanf("%d",&col);
printf("Enter your 1st matrix :\n");
for(i=0;i<row;++i)
   for(j=0;j<col;j++)
      {
      printf("Element(%d,%d) :",i+1,j+1);
      scanf("%d",&a[i][j]);
      }

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Matrix subtraction

#include<stdio.h>
void main()
{
int a[10][10],b[10][10],c[10][10],d[10][10],i,j,row,col;
clrscr();
printf("How many rows : ");
scanf("%d",&row);
printf("How many columns : ");
scanf("%d",&col);
printf("Enter your 1st matrix :\n");
for(i=0;i<row;++i)
   for(j=0;j<col;j++)
      {
      printf("Element(%d,%d) :",i+1,j+1);
      scanf("%d",&a[i][j]);
      }

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Sum of elements of a matrix

#include<stdio.h>

void main()

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