Last Test Results:

Compilation test...

> Driver_prj0.java ... passed!

Testing input/output... error in ../../../testCases/input.0.1:

Error: Could not find or load main class Driver_prj0

Caused by: java.lang.NoClassDefFoundError: Project0/Driver_prj0 (wrong name: Driver_prj0)

package Projecto; import java.util.Scanner; import java.util.Stack; public class Driver_prjo { //Your code doesn't have any syntax or runtime errors //i have provide two sample outputs //check whether it is working as per your logic // syntactically it is correct /* main * parameters: * args -- the array of command line argument values * return value: nothing * PUT YOUR COMMENTS FOR THIS FUNCTION HERE public static void main(String[] args) { // Here we initialize the scaner variable to read lines of input Scanner input = new Scanner(System.in); String line; // the callstack is used for storing the names of functions that have been // called and not yet returned //Adding some elements to stack for testing Stack callStack = new Stack(); callStack.push("F1"); callStack.push("F2"); callStack.push("F3"); // Each time we go through this while loop, we read a line of input. // The function hasNext() returns a boolean, which is checked by the while // condition. If System.in has reached the end of the file, it will return // false and the loop will exit. Otherwise, it will return true and the // loop will continue. int lineNumber = 0; int maximum_depth = 0; int flag = 0; while (input. hasNext()) { line = input.nextLine(); lineNumber++; System.out.println(line); // PUT YOUR CODE HERE if (callStack.empty()) { System.out.println("Invalid Trace at line "+lineNumber); System.out.println("Returning from "+line+" which was not called"); flag = 1; break; if(!(line.equals((String) callStack.peek())) { System.out.println("Invalid Trace at line "+lineNumber); System.out.println("Returning from "+line+" instead of "+callStack.peek) flag = 1; break; callStack.pop(); if(flag== && callStack.empty()) { System.out.println("Valid Trace"); System.out.println("Maximum call depth was "+callStack.size()); if(flag== && !callStack.empty()) System.out.println("Not all functions returned"); if(flagr=0 && !callStack.empty()) System.out.println("Not all functions returned"); if(flag==1) { System.out.println("Stack Trace:"); while(!callStack.empty()) System.out.println(callStack.pop()); www