Compiler Error C3019

  • Article

increment in OpenMP 'for' statement has improper form

The increment part of an OpenMP for loop must use the index variable both on the left and right side of the operator.

The following sample generates C3019:

// C3019.cpp
// compile with: /openmp
int main()
{
   int i = 0, j = 1, n = 3;

   #pragma omp parallel
   {
      #pragma omp for
      for (i = 0; i < 10; i = j + n)   // C3019
      // Try the following line instead:
      // for (i = 0; i < 10; i++)
         j *= 2;
   }
}