Java Program for Addition of two Matrices

import java.util.Scanner; //import Scanner class in our program

class demo
{
public static void main(String...s)
{
int i,j,n,m;
Scanner sc=new Scanner(System.in); //used to read from keyboard

System.out.print("Enter number of rows:");
m=sc.nextInt();
System.out.print("Enter number of columns:");
n=sc.nextInt();

int a1[][]=new int[m][n];
int a2[][]=new int[m][n];
int a3[][]=new int[m][n];

System.out.print("
Enter elements of first matrix:
");
for(i=0;i<m;++i)
for(j=0;j<n;++j)
a1[i][j]=sc.nextInt();

System.out.print("
Enter elements of second matrix:
");
for(i=0;i<m;++i)
for(j=0;j<n;++j)
a2[i][j]=sc.nextInt();

System.out.print("
Addition of Matrices:
");

for(i=0;i<m;++i)
{
for(j=0;j<n;++j)
{
a3[i][j]=a1[i][j]+a2[i][j];
System.out.print(a3[i][j]+" ");
}
System.out.print("
");
}


}
}

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C program to swap two numbers without using temp variable

#include<iostream.h>
#include<conio.h>

void main()
{
clrscr();
int a,b;
cout<<"Enter value of a:";
cin>>a;
cout<<"Enter value of b:";
cin>>b;

a=a+b;
b=a-b;
a=a-b;

cout<<"
a="<<a;
cout<<"
b="<<b;
getch();
}

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