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shuvikashshuvikash
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Added new program Assembly.java ronijpandey#2 
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‎Assembly.java

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import java.util.*;
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public class Assembly {
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public static void main(String args[]) {
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Scanner in = new Scanner(System.in);
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Map<String, Integer> vars = new HashMap<String, Integer>();
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Map<String, Integer> labels = new HashMap<String, Integer>();
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Map<Integer, Integer> endif = new HashMap<Integer, Integer>();
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Map<Integer, Integer> loop = new HashMap<Integer, Integer>();
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Stack ifs = new Stack();
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Stack fors = new Stack();
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String temp;
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ArrayList<String> code = new ArrayList<String>();
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while (true) {
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temp = in.nextLine();
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if(temp.equals("###")){
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break;
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}
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code.add(temp);
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}
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//temp = in.nextLine();
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//code.add(temp);
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int l = code.size();
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String comp[];
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int a, b, i;
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a=b=i=0;
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for (i = 0; i < l; i++) {
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comp = code.get(i).split(" ");
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switch (comp[0]) {
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case "SET":
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if (!vars.containsKey(comp[2])) {
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if (comp[2].compareTo("a") >= 0 && comp[2].compareTo("z") <= 0) {
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vars.put(comp[2], 0);
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}
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}
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if (comp[2].compareTo("a") >= 0 && comp[2].compareTo("z") <= 0) {
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vars.put(comp[1], vars.get(comp[2]));
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} else {
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vars.put(comp[1], Integer.parseInt(comp[2]));
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}
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break;
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case "ADD":
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if (vars.containsKey(comp[1])) {
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a = vars.get(comp[1]);
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} else if (comp[1].compareTo("a") >= 0 && comp[1].compareTo("z") <= 0) {
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vars.put(comp[1], 0);
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a = vars.get(comp[1]);
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} else {
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a = Integer.parseInt(comp[1]);
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}
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if (vars.containsKey(comp[2])) {
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b = vars.get(comp[2]);
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} else if (comp[2].compareTo("a") >= 0 && comp[2].compareTo("z") <= 0) {
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vars.put(comp[2], 0);
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b = vars.get(comp[2]);
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} else {
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b = Integer.parseInt(comp[2]);
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}
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vars.put(comp[3], a + b);
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break;
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case "IF":
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if (!vars.containsKey(comp[1])) {
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if (comp[1].compareTo("a") >= 0 && comp[1].compareTo("z") <= 0) {
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vars.put(comp[1], 0);
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}
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}
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if (!vars.containsKey(comp[2])) {
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if (comp[2].compareTo("a") >= 0 && comp[2].compareTo("z") <= 0) {
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vars.put(comp[2], 0);
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}
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}
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ifs.push(new Integer(i));
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fors.push(new Integer(i));
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break;
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case "LABEL":
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labels.put(comp[1], i);
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break;
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case "END":
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endif.put((Integer) ifs.pop(), i);
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if(!fors.empty()){
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fors.pop();
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}
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break;
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case "CONTINUE":
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loop.put(i, (Integer) fors.pop()-1);
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break;
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default:
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i = i; //do nothing
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}
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}
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i = 0;
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while (i < l) {
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comp = code.get(i).split(" ");
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switch (comp[0]) {
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case "SET":
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if (comp[2].compareTo("a") >= 0 && comp[2].compareTo("z") <= 0) {
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vars.put(comp[1], vars.get(comp[2]));
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} else {
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vars.put(comp[1], Integer.parseInt(comp[2]));
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}
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break;
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case "EXIT":
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i = l - 1;
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break;
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case "ECHO":
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if (vars.containsKey(comp[1])) {
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System.out.println(vars.get(comp[1]));
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} else if (comp[1].compareTo("a") >= 0 && comp[1].compareTo("z") <= 0) {
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vars.put(comp[1], 0);
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System.out.println(vars.get(comp[1]));
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} else {
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System.out.println(comp[1]);
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}
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break;
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case "ADD":
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if (vars.containsKey(comp[1])) {
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a = vars.get(comp[1]);
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} else {
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a = Integer.parseInt(comp[1]);
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}
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if (vars.containsKey(comp[2])) {
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b = vars.get(comp[2]);
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} else {
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b = Integer.parseInt(comp[2]);
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}
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vars.put(comp[3], a + b);
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break;
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case "GOTO":
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i = labels.get(comp[1]);
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break;
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case "IF":
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if (comp[1].compareTo("a") >= 0 && comp[1].compareTo("z") <= 0) {
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if (vars.containsKey(comp[1])) {
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a = vars.get(comp[1]);
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}} else {
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a = Integer.parseInt(comp[1]);
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}
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if (comp[2].compareTo("a") >= 0 && comp[2].compareTo("z") <= 0) {
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if (vars.containsKey(comp[2])) {
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b = vars.get(comp[2]);
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}} else {
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b = Integer.parseInt(comp[2]);
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}
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//System.out.print("a="+a+"b="+b);
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if (a == b) {
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break;
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} else {
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i = endif.get(i);
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}
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ifs.push(new Integer(i));
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break;
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case "LABEL":
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break;
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case "END":
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if(!ifs.empty()){
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ifs.pop();
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}
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break;
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case "CONTINUE":
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i = loop.get(i); //line no. of if
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break;
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default:
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i = i; //do nothing
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}
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//System.out.println("i="+i+" flag="+vars.get("flag"));
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i++;
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}
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}
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}

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