Add sample code from tests

assets/code/2223_a_2_a.cu

@@ -0,0 +1,42 @@
+#include <stdio.h>
+
+__global__ void calculate(float *a, float *b, float *c, float *d) {
+  // Kernel declaration
+  printf("test test\n");
+  float temp = *a + *b; // Pointer variable operation
+  *d = temp / *c;
+}
+
+int main(void) {
+  // Host variables and input
+  float a = 3.0, b = 7.0, c = 2.0;
+  float d;
+  // Device variables
+  float *a_dev, *b_dev, *c_dev, *d_dev;
+  int float_size = sizeof(float);
+
+  // Allocate memory device variables
+  cudaMalloc((void **)&a_dev, float_size);
+  cudaMalloc((void **)&b_dev, float_size);
+  cudaMalloc((void **)&c_dev, float_size);
+  cudaMalloc((void **)&d_dev, float_size);
+
+  // Copy input from host to device
+  cudaMemcpy(a_dev, &a, float_size, cudaMemcpyHostToDevice);
+  cudaMemcpy(b_dev, &b, float_size, cudaMemcpyHostToDevice);
+  cudaMemcpy(c_dev, &c, float_size, cudaMemcpyHostToDevice);
+
+  // Launch kernel
+  calculate<<<1, 1>>>(a_dev, b_dev, c_dev, d_dev);
+
+  // Copy result, and print
+  cudaMemcpy(&d, d_dev, float_size, cudaMemcpyDeviceToHost);
+  printf("d is: %f\n", d);
+
+  // Clean up device memory
+  cudaFree(a_dev);
+  cudaFree(b_dev);
+  cudaFree(c_dev);
+  cudaFree(d_dev);
+  return 0;
+}