Question

Q) Write an interactive Java program that adds two integers of up to 50 digits each (Represents integer as an array of digits).

Answer 1

import java.util.* ;

public class Calculator {
public static void main(String[] args) {
Scanner s = new Scanner(System.in);
System.out.print("Enter the first integer:");
String a = s.nextLine();
System.out.print("Enter the second integer:");
String b = s.nextLine();
int[] num1 = new int[a.length()];
int[] num2 = new int[b.length()];
for (int i=0;i<a.length();i++) {
num1[i] = (int) a.charAt(i);
num2[i] = (int) b.charAt(i);
}
int[] sum = new int[a.length()];
for (int n=b.length()-1;n>=0;n--)
{
if (num1[n]+num2[n]<10)
{
sum[n]=num1[n]+num2[n];

}
if (num1[n]+num2[n]>=10)
{
sum[n]=(num1[n]+num2[n]);
sum[n-1]=sum[n-1]+1;
}
}
for (int d=0; d<a.length();d++) {
System.out.print(sum[d]+" ");
}
}
}