1 files changed, 56 insertions, 0 deletions
diff --git a/get_mode.cpp b/get_mode.cpp
new file mode 100644
index 0000000..edf0958
--- /dev/null
+++ b/get_mode.cpp
@@ -0,0 +1,56 @@
+
+#include "statistics.h"
+
+using namespace std;
+
+float get_mode(const char *filename)
+{
+    ifstream in;
+    in.open(filename);
+
+    unsigned size = 1024;
+    int *data = new int[size];
+
+    int i = 0;
+    int max = 0;
+
+    while (!in.eof()) {
+        in >> data[i];
+        if (data[i] > max)
+            max = data[i];
+        i++;
+        
+        if (i >= size) { // have to reallocate array if we get too big
+            size *= 2;
+            int *newdata = new int[size];
+            for (int j = 0; j <= i; j++)
+                newdata[j] = data[j];
+            delete data;
+            data = newdata;
+        }
+    }
+    i--;
+    int *freq = new int[i];
+
+    int j;
+    for (j = 0; j < i; j++)
+        freq[j] = 0;
+
+    for (j = 0; j < i; j++)
+        freq[data[j]]++;
+
+    float mode = 0;
+    max = 0;
+    for (j = 0; j < i; j++) {
+        if (freq[j] > max) {
+            max = freq[j];
+            mode = (float)j;
+        }
+    }
+
+    in.close();
+    delete freq;
+    delete data;
+
+    return mode;
+}