Start using header files, remove old middle square PRNG. Will switch to Lehmers random number generator

comprun.sh

@@ -1,4 +1,4 @@
 #!/bin/sh
 
-gcc hello.c
+gcc main.c lib/*.c
 ./a.out

hello.c

@@ -1,186 +0,0 @@
-#include <stdio.h>
-
-float farenheitToCelsius(float farenheit) {
-  return (farenheit - 32.0) / 1.8;
-}
-
-float celsiusToFarenheit(float celsius) {
-  return (celsius * 1.8) + 32.0;
-}
-
-int sizeofStr(char in[]) {
-  int i = 0;
-  for (i = 0; in[i] != '\0'; ++i)
-    ;
-  return i;
-}
-
-void printStrArray(char in[]) {
-  int i;
-  printf("{ ");
-  for (i = 0; i < sizeofStr(in); ++i) {
-    printf("%c", in[i]);
-    if (i == sizeofStr(in) - 1) {
-      printf(" }\n");
-    } else {
-      printf(", ");
-    }
-  }
-}
-
-void printIntArray(int in[], int inLength) {
-  int i;
-  printf("{ ");
-  for (i = 0; i < inLength; ++i) {
-    printf("%d", in[i]);
-    if (i == inLength - 1) {
-      printf(" }\n");
-    } else {
-      printf(", ");
-    }
-  }
-}
-
-int checkIntArraySorted(int in[], int inLength) {
-  int i = 0;
-  while(i < inLength - 1) {
-    if (in[i] > in[i + 1])
-      return 0;
-    ++i;
-  }
-  
-  return 1;
-}
-
-void swapInt(int *x, int *y) {
-  int temp = *x;
-  *x = *y;
-  *y = temp;
-}
-
-/* Count the number of digits an integer has */
-unsigned long long intDigitCount(unsigned long long in) {
-  unsigned long long largestDigit;
-  int digitCount = 0;
-  for (largestDigit = 1; in / largestDigit != 0; largestDigit *= 10)
-    ++digitCount;
-  return digitCount;
-}
-
-/* Expand an integer into an integer whose first unit is 1 followed by a leading trail of 0's*/
-unsigned long long intDigitExpand(unsigned long long in) {
-  int expandedDigit;
-  for (expandedDigit = 1; in != 1; --in)
-    expandedDigit *= 10;
-  return expandedDigit; 
-}
-
-/* Convert an integer array into a combined integer */
-int intArrayToInt(int in[], int inLength) {
-  int i;
-  int out = 0;
-  int currentDigit = inLength;
-  for (i = 1; i <= inLength; ++i) {
-    out += in[i - 1] * intDigitExpand(currentDigit);
-    --currentDigit;
-  }
-  return out;
-}
-
-/* Split an integer into an integer array */
-void intToIntArray(int in, int out[]) {
-  int i;
-  int j = 0;
-  int currentDigit;
-  for(i = intDigitCount(in); i >= 1; --i) {
-    out[j] = in / intDigitExpand(i);
-    in -= intDigitExpand(i) * out[j];
-    ++j;
-  }
-}
-
-/* Pseudo Random Number Generator using the Middle-square method */
-int randIntMiddleSquare(unsigned long long *seed, int iteration) {
-  int i;
-  int oldSeedLength = intDigitCount(*seed);
-  for (i = 0; i < iteration; ++i) {
-    unsigned long long seedSquared = *seed * *seed;
-    unsigned long long seedSquaredLength = intDigitCount(seedSquared);
-    printf("Seed squared: %d\n", seedSquared);
-    printf("Seed squared length: %d\n", seedSquaredLength);
-    int seedSquaredArray[seedSquaredLength]; 
-    int middleStart = (seedSquaredLength - oldSeedLength) / 2;
-    printf("Middle start: %d\n", middleStart);
-    int newSeedArray[oldSeedLength];
-    int j;
-    intToIntArray(seedSquared, seedSquaredArray);
-    for (int j = 0; j < oldSeedLength; ++j) {
-      newSeedArray[j] = seedSquaredArray[middleStart];
-      ++middleStart;
-    }
-    printIntArray(newSeedArray, sizeof(newSeedArray) / sizeof(int));
-    unsigned long long newSeed = intArrayToInt(newSeedArray, sizeof(newSeedArray) / sizeof(int));
-    int newSeedLength = intDigitCount(newSeed);
-    /* If the result has fewer than 2n digits, leading zeroes are added to compensate */
-    if (newSeedLength < oldSeedLength)
-      newSeed *= intDigitExpand(oldSeedLength - newSeedLength) * 10; 
-    *seed = newSeed;
-  }
-
-  return *seed;
-}
-
-int randIntMiddleSquareRange(int start, int end, unsigned long long *seed) {
-
-  int endLength = intDigitCount(end);
-  if (endLength > intDigitCount(*seed))
-    return -1;
-  
-  unsigned long long randomNumber = randIntMiddleSquare(seed, 1);
-  printf("The random number: %d\n", randomNumber);
-  int randomNumberLength = intDigitCount(randomNumber);
-  int randomNumberArray[randomNumberLength];
-  int truncatedNumber;
-  int truncatedNumberArray[endLength];
-  int middleStart = (randomNumberLength - endLength) / 2;
-  intToIntArray(randomNumber, randomNumberArray);
-  for (int j = 0; j < endLength; ++j) {
-    truncatedNumberArray[j] = randomNumberArray[middleStart];
-    ++middleStart;
-  }
-  truncatedNumber = intArrayToInt(truncatedNumberArray, sizeof(truncatedNumberArray) / sizeof(int));
-  
-  if (truncatedNumber <= end && truncatedNumber >= start)
-    return truncatedNumber;
-  else
-    randIntMiddleSquareRange(start, end, seed);
-}
-
-int main() {
-  int unsortedArray[] = { 1, 5, 2, 1, 4, 8, 3, 2, 6, 7 };
-  int sortedArray[] = { 1, 2, 4, 8, 9, 9, 9 };
-
-  printf("Unsorted Array : ");
-  printIntArray(unsortedArray, sizeof(unsortedArray) / sizeof(int));
-  printf("Unsorted Array Sorted?: %d\n", checkIntArraySorted(unsortedArray, sizeof(unsortedArray) / sizeof(int)));
-  printf("Sorted Array : ");
-  printIntArray(sortedArray, sizeof(sortedArray) / sizeof(int));
-  printf("Sorted Array Sorted?: %d\n", checkIntArraySorted(sortedArray, sizeof(sortedArray) / sizeof(int)));
-
-  int number = 3372; 
-  int intArray[4];
-
-  intToIntArray(number, intArray);
-  printIntArray(intArray, sizeof(intArray) / sizeof(int));
-
-  printf("Back to int %d\n", intArrayToInt(intArray, sizeof(intArray) / sizeof(int)));
-
-  unsigned long long seed = 3791;
-  printf("Squared: %d\n", seed * seed);
-  int iteration = 1;
-  printf("Starting random number %d\n", seed);
-  printf("Random number is %d after iteration %d\n", randIntMiddleSquare(&seed, iteration), iteration);
-
-  printf("Random: %d\n", randIntMiddleSquareRange(1, 10, &seed));
-
-}

lib/array.c

@@ -0,0 +1,70 @@
+#include <stdio.h>
+#include "base10.h"
+
+int sizeofStr(char in[]) {
+  int i = 0;
+  for (i = 0; in[i] != '\0'; ++i)
+    ;
+  return i;
+}
+
+void printStrArray(char in[]) {
+  int i;
+  printf("{ ");
+  for (i = 0; i < sizeofStr(in); ++i) {
+    printf("%c", in[i]);
+    if (i == sizeofStr(in) - 1) {
+      printf(" }\n");
+    } else {
+      printf(", ");
+    }
+  }
+}
+
+void printIntArray(int in[], int inLength) {
+  int i;
+  printf("{ ");
+  for (i = 0; i < inLength; ++i) {
+    printf("%d", in[i]);
+    if (i == inLength - 1) {
+      printf(" }\n");
+    } else {
+      printf(", ");
+    }
+  }
+}
+
+int checkIntArraySorted(int in[], int inLength) {
+  int i = 0;
+  while(i < inLength - 1) {
+    if (in[i] > in[i + 1])
+      return 0;
+    ++i;
+  }
+  
+  return 1;
+}
+
+/* Convert an integer array into a combined integer */
+int intArrayToInt(int in[], int inLength) {
+  int i;
+  int out = 0;
+  int currentDigit = inLength;
+  for (i = 1; i <= inLength; ++i) {
+    out += in[i - 1] * intDigitExpand(currentDigit);
+    --currentDigit;
+  }
+  return out;
+}
+
+/* Split an integer into an integer array */
+void intToIntArray(int in, int out[]) {
+  int i;
+  int j = 0;
+  int currentDigit;
+  for(i = intDigitCount(in); i >= 1; --i) {
+    out[j] = in / intDigitExpand(i);
+    in -= intDigitExpand(i) * out[j];
+    ++j;
+  }
+}

lib/array.h

@@ -0,0 +1,16 @@
+#ifndef ARRAY_H
+#define ARRAY_H
+
+int sizeofStr(char in[]);
+
+void printStrArray(char in[]);
+
+void printIntArray(int in[], int inLength);
+
+int checkIntArraySorted(int in[], int inLength);
+
+void intToIntArray(int in, int out[]);
+
+int intArrayToInt(int in[], int inLength);
+
+#endif

lib/base10.c

@@ -0,0 +1,16 @@
+/* Count the number of digits an integer has */
+unsigned long long intDigitCount(unsigned long long in) {
+  unsigned long long largestDigit;
+  int digitCount = 0;
+  for (largestDigit = 1; in / largestDigit != 0; largestDigit *= 10)
+    ++digitCount;
+  return digitCount;
+}
+
+/* Expand an integer into an integer whose first unit is 1 followed by a leading trail of 0's*/
+unsigned long long intDigitExpand(unsigned long long in) {
+  int expandedDigit;
+  for (expandedDigit = 1; in != 1; --in)
+    expandedDigit *= 10;
+  return expandedDigit; 
+}

lib/base10.h

@@ -0,0 +1,8 @@
+#ifndef BASE10_H
+#define BASE10_H
+
+unsigned long long intDigitCount(unsigned long long in);
+
+unsigned long long intDigitExpand(unsigned long long in); 
+
+#endif

lib/temperature.c

@@ -0,0 +1,7 @@
+float farenheitToCelsius(float farenheit) {
+  return (farenheit - 32.0) / 1.8;
+}
+
+float celsiusToFarenheit(float celsius) {
+  return (celsius * 1.8) + 32.0;
+}

lib/temperature.h

@@ -0,0 +1,8 @@
+#ifndef TEMP_H
+#define TEMP_H
+
+float farenheitToCelsius(float farenheit);
+
+float celsiusToFarenheit(float celsius);
+
+#endif

main.c

@@ -0,0 +1,28 @@
+#include <stdio.h>
+#include "lib/temperature.h"
+#include "lib/array.h"
+#include "lib/base10.h"
+
+void swapInt(int *pX, int *pY) {
+  int temp = *pX;
+  *pX = *pY;
+  *pY = temp;
+}
+
+
+
+
+int main() {
+  int unsortedArray[] = { 1, 5, 2, 1, 4, 8, 3, 2, 6, 7 };
+  int sortedArray[] = { 1, 2, 4, 8, 9, 9, 9 };
+
+  printf("Unsorted Array : ");
+  printIntArray(unsortedArray, sizeof(unsortedArray) / sizeof(int));
+  printf("Unsorted Array Sorted?: %d\n", checkIntArraySorted(unsortedArray, sizeof(unsortedArray) / sizeof(int)));
+  printf("Sorted Array : ");
+  printIntArray(sortedArray, sizeof(sortedArray) / sizeof(int));
+  printf("Sorted Array Sorted?: %d\n", checkIntArraySorted(sortedArray, sizeof(sortedArray) / sizeof(int)));
+
+  printf("40C == %dF", (int) celsiusToFarenheit(40.0));
+
+}