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5 February, 15:21

Write code to complete doublePennies () 's base case. Sample output for below program with inputs 1 and 10: Number of pennies after 10 days: 1024 Note: If the submitted code has an infinite loop, the system will stop running the code after a few seconds, and report "Program end never reached." The system doesn't print the test case that caused the reported message.

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  1. 5 February, 18:44
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    public class CalculatePennies {

    / / Returns number of pennies if pennies are doubled numDays times

    public static long doublePennies (long numPennies, int numDays) {

    long totalPennies = 0;

    / * Your solution goes here * /

    if (numDays = = 0) {

    totalPennies = numPennies;

    }

    else {

    totalPennies = doublePennies ((numPennies * 2), numDays - 1);

    }

    return totalPennies;

    }

    / / Program computes pennies if you have 1 penny today,

    / / 2 pennies after one day, 4 after two days, and so on

    public static void main (String [] args) {

    long startingPennies = 0;

    int userDays = 0;

    startingPennies = 1;

    userDays = 10;

    System. out. println ("Number of pennies after " + userDays + " days: "

    + doublePennies (startingPennies, userDays));

    return;

    }

    }
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