Chapter 2

1. CUDA program to subtract two numbers by passing parameters as value is as follows:

include <iostream>
#include <cuda.h>
#include <cuda_runtime.h>
__global__ void gpuSub(int d_a, int d_b, int *d_c) 
{
 *d_c = d_a - d_b;
}
int main(void) 
{
  int h_c;
  int *d_c;
  cudaMalloc((void**)&d_c, sizeof(int));
 gpuSub << <1, 1 >> > (4, 1, d_c);
 cudaMemcpy(&h_c, d_c, sizeof(int), cudaMemcpyDeviceToHost);
 printf("4-1 = %d\n", h_c);
 cudaFree(d_c);
 return 0;
}

2. CUDA program to multiply two numbers by passing parameters as reference is as follows:

#include <iostream>
#include <cuda.h>
#include <cuda_runtime.h>
 __global__ void gpuMul(int *d_a, int *d_b, int *d_c) 
{
 *d_c = *d_a * *d_b;
}
int main(void) 
{
 int h_a,h_b, h_c;
 int *d_a,*d_b,*d_c;
 h_a = 1;
 h_b = 4;
 cudaMalloc((void**)&d_a, sizeof(int));
 cudaMalloc((void**)&amp...