Name: ____________________________________________________ Alpha: _____________________

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2. [30pts] Consider the code below. The program is supposed to read in the first 10 words of the file tmp.txt, change any leading lower-case letters to upper case, and then print the words out. However, the program is buggy. Fix the code! Note the your program should output what's on the below right.

   ~/$ ./.a.out
   Brainy
   Level
   Shrug
   Unwritten
   Ready
   Disgusted
   Squealing
   Changeable
   Earthquake
   Male
   

   
   #include <iostream>
   #include <fstream>
   #include <cmath>
   using namespace std;
   
   string* getWords(string filename, int k);
   
   int main() {
      string* A = getWords("tmp.txt",10);
   
      for( int i = 0; i <= 10; i++ ) {
        if( "a" <= A[i][0] && A[i][0] <= "z" )
          A[i][0] -= 32;
      }
   
      for( int i = 0; i <= 10; i++ )
        cout << A[i] << endl;
   
      return 0;
   }
   
   string* getWords(string filename, int k) {
      ifstream fin(filename);
      string* W = new string*[k];
      while(--k >= 0 && fin >> W[k]);
      return W;
   }
   

   Turn in a screenshot showing your program running, and a codeprint printout of your code.
3. [70 pts] The following is a program that uses iteration within the function pow() to calculate the power of a number. Rewrite pow so it performs the same task recursively. The prototype of pow and the main function should be untouched. No loops!

   ~/$ ./.a.out
   Enter x: 3.6
   Enter n: 7
   x^n is 7836.42
   

   
   #include <iostream>
   using namespace std;
   
   double pow(double, int);
   
   int main() {
     double x;
     int n;
     cout << "Enter x: ";
     cin >> x;
     cout << "Enter n: ";
     cin >> n;
     double xn = pow(x,n);
     cout << "x^n is " << xn << endl;
     return 0;
   }
   
   double pow(double x, int n) {
     double product = 1;
     for( int i = 0; i < n; i++ )
         product *= x;
     
     return product;
   } 
   

   Turn in a screenshot showing your program running, and a codeprint printout of your code.