Programming In Java Week 12: Programming Assignments Jan-Jun 2022

  NPTEL PROGRAMMING ASSIGNMENTS

Programming In Java

Week 12 : Programming Assignment 1

Due on 2022-04-21, 23:59 IST

Complete the code to develop an extended version of the ADVANCED CALCULATOR with added special functions that emulates all the functions of the GUI Calculator as shown in the image.

Note the following points carefully:
1. Use only doubleto store all numeric values.
2. Each button on the calculator should be operated by typing the characters from 'a' to 't'.
3. You may use the already defined function gui_map(char).
4. Use predefined methods from java.lang.Math class wherever applicable.
5. Without '=' binary operations won't give output as shown in Input_3 and Output_3 example below.
5. The calculator should be able to perform required operations on one or two operands as shown in the below example:

Input_1:
okhid

Output_1:
100.0

Input_2:
ia

Output_2:

2.0

--Solution-- 

  char seq[] = input.toCharArray(); int outflag=0; for(int i=0; i<seq.length; i++){ seq[i]=gui_map(seq[i]); if (seq[i]=='R' || seq[i]=='S' || seq[i]=='F' ||seq[i]=='C') break; } double operand1=0.0; String o1=""; double operand2=0.0; String o2=""; double output=0.0; outerloop: for(int i=0; i<seq.length; i++){ if(seq[i]=='C'){ //Clear operand1=0.0; operand2=0.0; output=0.0; outflag=0; break outerloop; }else if(seq[i]=='R'){ //Square Root for(int j=0; j<i; j++){ o1+=Character.toString(seq[j]); } operand1=Double.parseDouble(o1); output=Math.sqrt(operand1); outflag=1; break outerloop; } else if(seq[i]=='S'){ //Square for(int j=0; j<i; j++){ o1+=Character.toString(seq[j]); } operand1=Double.parseDouble(o1); output=Math.pow(operand1,2); outflag=1; break outerloop; }else if(seq[i]=='F'){ //Inverse for(int j=0; j<i; j++){ o1+=Character.toString(seq[j]); } operand1=Double.parseDouble(o1); output=Math.pow(operand1,-1); outflag=1; break outerloop; }else{ int r=0; if(seq[i]=='+'||seq[i]=='/'||seq[i]=='*'||seq[i]=='='){ for(int j=0; j<i; j++){ o1+=Character.toString(seq[j]); } operand1=Double.parseDouble(o1); for(int k=i+1; k<seq.length; k++){ if(seq[k]=='='){ outflag=1; operand2=Double.parseDouble(o2); if(seq[i]=='+'){ output=operand1+operand2; }else if(seq[i]=='-'){ output=operand1-operand2; }else if(seq[i]=='/'){ output=operand1/operand2; }else if(seq[i]=='*'){ output=operand1*operand2; } break outerloop; }else{ o2+=Character.toString(seq[k]); } } } } } if(outflag==1) System.out.print(output);

Week 12 : Programming Assignment 2

Due on 2022-04-21, 23:59 IST

A partial code fragment is given. The URL class object is created in try block.You should write appropriate method( )  to print the protocol name and host name from the given url string.
For example:

https://www.xyz.com:1080/index.htm

 

protocol://host:port/filename

--Solution-- 

  try{ URL url=new URL("http://www.Nptel.com/java-tutorial"); System.out.println("Protocol: "+url.getProtocol()); System.out.println("Host Name: "+url.getHost()); } catch(Exception e){System.out.println(e);} } }

Week 12 : Programming Assignment 3

Due on 2022-04-21, 23:59 IST

Write a program to create a record by taking inputs using Scanner class as first name as string ,last name as string ,roll number as integer ,subject1 mark as float,subject2 mark as float. Your program should print in the format 
  "name  rollnumber avgmark".

For example:

input:

ram

das

123

25.5

24.5

output:

ramdas 123 25.0

--Solution-- 

  String a = s1.next(); String b = s1.next(); int c = s1.nextInt(); float d1 = s1.nextFloat(); float d2 = s1.nextFloat(); float avg = (d1+d2)/2; System.out.print(a+b+" "+c+" "+avg);

Week 12 : Programming Assignment 4

Due on 2022-04-21, 23:59 IST

A program code is given to call the parent class static method and instance method in derive class without creating object of parent class. You should write the appropriate code so that the program print the contents of static method() and instance method () of parent class.

 

--Solution-- 

  public static void main(String[] args) { Child c = new Child(); c.testInstanceMethod(); Parent.testClassMethod(); } }

Week 12 : Programming Assignment 5

Due on 2022-04-21, 23:59 IST

Write a recursive function to print the sum of  first n odd integer numbers. The recursive function should have the prototype
 " int sum_odd_n(int n) ".

For example :

input : 5
output: 25 

input : 6
output : 36

--Solution-- 

  //Call the method recursively. return 2*n-1 + sum_odd_n(n-1);