renaming

labs/memory_debugging/buggy_lab.cpp

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+#include <iostream>
+#include <fstream>
+
+#define MAX_ARRAY_SIZE 50
+
+
+
+/** IMPORTANT: SOLUTIONS THAT DO NOT FOLLOW BELOW INSTRUCTIONS WILL RECEIVE NO CREDIT
+ * Do not add or modify code in this file UNLESS ASKED TO! 
+ * You are NOT allowed to declare new variables; use the ones already declared.
+ * You are NOT allowed to create new helper functions or modify checkCorrectSmallest()
+**/
+
+
+
+/** DO NOT MODIFY THIS FUNCTION! **/
+int checkCorrectSmallest(int* smallestNum, const std::string& filename) {
+    if (filename == "first.txt" || filename == "middle.txt") {
+        if (*smallestNum != 1) {return -1;}
+    }
+
+    else if (filename == "last.txt") {
+        if (*smallestNum != 22) {return -1;}
+    }
+
+    return 1;
+}
+
+/** A function that will identify the mean and smallest number
+  * in a set of data provided that there are at most 50 numbers 
+  * in the file.
+  *
+  * @param filename: The name of a file that contains a list of numbers.
+  *
+  * Task: Add or modify code in the appropriate sections to fix memory and logic errors
+  * without using data structures (such as an array or vector) and without using any
+  * additional memory on the stack.
+**/
+
+void identifyMeanAndMin(const std::string& filename) {
+   int* numElements;
+   int* sum;
+   int* smallestNum;
+   float* avg;
+
+   /** PART 1: ADD CODE BELOW **/
+
+
+
+
+   /** PART 1: ADD CODE ABOVE **/
+
+   *numElements = 0;
+   *sum = 0;
+
+   int readInt;
+   int* intArray = new int[MAX_ARRAY_SIZE];
+   std::ifstream input(filename);
+
+   while (input >> readInt) {
+       *(intArray + *numElements) = readInt;
+       *numElements += 1;
+   }
+
+   std::cout << "Printing the contents of the array in reverse order:  ";
+
+   /** PART 2: MODIFY CODE BELOW **/
+
+   for (int i = MAX_ARRAY_SIZE; i >= -1; i--) {
+       // If we're at the beginning of the for loop, initalize *smallestNum
+       // Else, compare *smallestNum to current element in the for loop
+       if (i == MAX_ARRAY_SIZE) {
+           *smallestNum = *(intArray + i);
+       }
+
+       else {
+           if (*smallestNum > *(intArray + i)) {
+               *smallestNum = *(intArray + i);
+	   	   }
+       }
+
+   /** PART 2: MODIFY CODE ABOVE **/
+
+       *sum += *(intArray + i);
+       std::cout << *(intArray + i) << " ";
+   }
+ 
+   std::cout << std::endl;
+   if (checkCorrectSmallest(smallestNum, filename) == -1) {
+       std::cout << "ERROR: incorrect value for smallest number" << std::endl;
+       return;
+   }
+
+   *avg = *sum / float(*numElements);
+   std::cout << "The average for the set of numbers in " << filename << " is "
+	     << *avg << " and the smallest number is " << *smallestNum
+	     << std::endl;
+
+   /** PART 3: ADD AND/OR MODIFY CODE BELOW **/
+
+   delete intArray;
+
+   /** PART 3: ADD AND/OR MODIFY CODE ABOVE **/
+}
+
+int main() {
+   identifyMeanAndMin("first.txt");
+   std::cout << std::endl;
+
+   identifyMeanAndMin("middle.txt");
+   std::cout << std::endl;
+
+   identifyMeanAndMin("last.txt");
+   return 0;
+}
+