add radix

src/radix_sort_par3.cu

@@ -26,15 +26,17 @@ void countSort(int arr[], int n, int exp)
     int *d_arr;
 
     int *output= (int*)malloc(sizeof(int)*n); // output array 
-    int i, count[10] = {0}; 
+    int i;
+    int d_count[10] = {0}; 
+    int h_count[10] = {0};
     cudaMalloc((void**)&d_arr,sizeof(int)*n);
     //cudaMalloc((void**)&count,sizeof(int)*10);
     cudaMemcpy(d_arr, arr, sizeof(int)*n,cudaMemcpyHostToDevice);
-    //cudaMemset(count,0,sizeof(int)*10);
+    //cudaMemset(d_count,0,sizeof(int)*10);
   
     // Store count of occurrences in count[] 
-    storeCount<<<1,32>>>(count,d_arr,n,exp); 
-  
+    storeCount<<<1,32>>>(d_count,d_arr,n,exp); 
+    cudaMemcpy(h_count, d_count, sizeof(int)*10,cudaMemcpyDeviceToHost);
     // Change count[i] so that count[i] now contains actual 
     //  position of this digit in output[] 
     for (i = 1; i < 10; i++)