底下以向量相加的範例，示範 UVA 的宣告與使用：

#include<stdio.h>
#include<time.h>
#include<stdlib.h>

#define SIZE 100000

__global__ static void vecAdd(int *a, int *b, int *c, int len){
	int idx = blockIdx.x * blockDim.x + threadIdx.x;
	if(idx<len){
		c[idx] = a[idx] + b[idx];
	}
}

int main(int argc,char **argv)
{
	int *a, *b, *c1, *c2;
	int i, err = 0;
	
	cudaHostAlloc((void**)&a, sizeof(int) * SIZE, cudaHostAllocDefault);
	cudaHostAlloc((void**)&b, sizeof(int) * SIZE, cudaHostAllocDefault);
	cudaHostAlloc((void**)&c1, sizeof(int) * SIZE, cudaHostAllocDefault);
	cudaHostAlloc((void**)&c2, sizeof(int) * SIZE, cudaHostAllocDefault);
	
	srand(time(NULL));
	for(i=0;i<SIZE;i++){
		a[i] = rand() % 100;
		b[i] = rand() % 100;
		c1[i] = a[i] + b[i];
	}

	vecAdd<<<100, 1000>>>(a, b, c2, SIZE);
	cudaThreadSynchronize();
	
	for(i=0;i<SIZE;i++){
		err += abs(c1[i]-c2[i]);
	}
	printf("Err: %d", err);
	
	return 0;
}