C Program for Radix Sort

C/Radix Sort.c

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+#include<stdio.h>
+
+int getMax(int arr[], int n) {
+    int mx = arr[0];
+    int i;
+    for (i = 1; i < n; i++)
+        if (arr[i] > mx)
+            mx = arr[i];
+    return mx;
+}
+
+void countSort(int arr[], int n, int exp) {
+    int output[n]; // output array
+    int i, count[10] = { 0 };
+
+    // Store count of occurrences in count[]
+    for (i = 0; i < n; i++)
+        count[(arr[i] / exp) % 10]++;
+
+    for (i = 1; i < 10; i++)
+        count[i] += count[i - 1];
+
+    // Build the output array
+    for (i = n - 1; i >= 0; i--) {
+        output[count[(arr[i] / exp) % 10] - 1] = arr[i];
+        count[(arr[i] / exp) % 10]--;
+    }
+
+    for (i = 0; i < n; i++)
+        arr[i] = output[i];
+}
+
+// The main function to that sorts arr[] of size n using Radix Sort
+void radixsort(int arr[], int n) {
+    int m = getMax(arr, n);
+
+    int exp;
+    for (exp = 1; m / exp > 0; exp *= 10)
+        countSort(arr, n, exp);
+}
+
+void print(int arr[], int n) {
+    int i;
+    for (i = 0; i < n; i++)
+        printf("%d ", arr[i]);
+}
+
+int main() {
+    int arr[] = { 170, 45, 75, 90, 802, 24, 2, 66 };
+    int n = sizeof(arr) / sizeof(arr[0]);
+    radixsort(arr, n);
+    print(arr, n);
+    return 0;
+}