From 442a49ad5a48d417345959b903ae6a6d32d55759 Mon Sep 17 00:00:00 2001
From: Haidong Ji
Date: Fri, 15 Apr 2022 15:51:30 -0500
Subject: Great C programming fun

Excellent fundamentals and displine training, many tools and techniques
exercises: gdb, emacs, valgrind, git
---
 14_array_max/arrayMax.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 14_array_max/arrayMax.c

(limited to '14_array_max/arrayMax.c')

diff --git a/14_array_max/arrayMax.c b/14_array_max/arrayMax.c
new file mode 100644
index 0000000..5fc5d62
--- /dev/null
+++ b/14_array_max/arrayMax.c
@@ -0,0 +1,56 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int * arrayMax(int * array, int n) {
+  if (n == 0){
+    return NULL;
+  }
+  int maxInt = array[0];
+  int * answer = array;
+  for (int i = 1; i < n; i++) {
+    if (array[i] > maxInt) {
+      maxInt = array[i];
+      answer = &array[i];
+    }
+  }
+  return answer;
+}
+
+void doTest(int * array, int n) {
+  printf("arrayMax(");
+  if (array == NULL) {
+    printf("NULL");
+  }
+  else {
+    printf("{");
+    for (int i =0; i < n; i++) {
+      printf("%d", array[i]);
+      if (i < n -1) {
+	printf(", ");
+      }
+    }
+    printf("}");
+  }
+  printf(", %d) is \n", n);
+  int * p = arrayMax (array, n);
+  if (p == NULL) {
+    printf("NULL\n");
+  }
+  else {
+    printf("%d\n", *p);
+  }
+}
+
+int main(void) {
+  int array1[] = { 77, 33, 19, 99, 42, 6, 27, 4};
+  int array2[] = { -3, -42, -99, -1000, -999, -88, -77};
+  int array3[] = { 425, 59, -3, 77, 0, 36};
+
+  doTest (array1, 8);
+  doTest (array2, 7);
+  doTest (array3, 6);
+  doTest (NULL, 0);
+  doTest (array1, 0);
+  
+  return EXIT_SUCCESS;
+}
-- 
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