GPU array addition using OpenMP - c++

Question

I am trying out OpenMP offloading with an nvidia GPU and I am trying to do some array calculations with it in C++.
Right now my output is not desirable, as I am new with offloading calculations with OpenMP. Would appreciate if someone can point me to the correct direction.
Code Snippet:
#include <omp.h>
#include <iostream>
using namespace std;
int main(){
int totalSum, ompSum;
const int N = 1000;
int array[N];
for (int i=0; i<N; i++){
array[i]=i;
}
#pragma omp target
{
#pragma omp parallal private(ompSum) shared(totalSum)
{
ompSum=0;
#pragma omp parallel for
for (int i=0; i<N; i++){
ompSum += array[i];
}
#pragma omp critical
totalSum += ompSum;
}
printf ( "Caculated sum should be %d but is %d\n", N*(N-1)/2, totalSum );
}
return 0;
}
Right now, I know that the sum should calculate to a number 499500, but my machine is outputting extremely big numbers that are also negative.

Answer 1

You have some typos on the OpenMP constructors, namely:
#pragma omp parallal -> #pragma omp parallel;
#pragma omp parallel for -> #pragma omp for
Regarding 2. you do not need the parallel because you are already inside a parallel region.
Try the following:
using namespace std;
int main(){
int totalSum = 0, ompSum = 0;
const int N = 1000;
int array[N];
for (int i=0; i<N; i++){
array[i]=i;
}
#pragma omp target
{
#pragma omp parallel private(ompSum) shared(totalSum)
{
ompSum=0;
#pragma omp for
for (int i=0; i<N; i++){
ompSum += array[i];
}
#pragma omp critical
totalSum += ompSum;
}
printf ( "Caculated sum should be %d but is %d\n", N*(N-1)/2, totalSum );
}
return 0;
}