#include <stdio.h>
#include "assert.h"
#include <unistd.h>

#pragma omp declare target
void vmul(int*a, int*b, int*c, int N);
#pragma omp end declare target

int main(){
    const int N = 100000;    
    int a[N],b[N],c[N],validate[N];
    int flag=-1; // Mark Success
    for(int i=0;i<N;i++) {
        a[i]=i+1;
        b[i]=i+2;
        validate[i]=a[i]*b[i];
    }
#pragma omp target
{
    vmul(a,b,c,N);
}

    for(int i=0;i<N;i++) {
        if(c[i]!=validate[i]) {
//          print 1st bad index
            if( flag == -1 ) 
              printf("First fail: c[%d](%d) != validate[%d](%d)\n",i,c[i],i,validate[i]);
            flag = i;
        }
    }
    if( flag == -1 ){
        printf("Success\n");
        return 0;
    } else {
        printf("Last fail: c[%d](%d) != validate[%d](%d)\n",flag,c[flag],flag,validate[flag]);
        printf("Fail\n");
        return 1;
    }
}