exp_2: Verify Zero Order Forward Sweep
Keywords: exp_2: verify zero order forward sweep exp_2

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exp_2: Verify Zero Order Forward Sweep
`

    # include <cmath>            // for fabs function
    bool exp_2_for0(double *v0)  // double v0[6]
    {    bool  ok = true;
         double x = .5;

         v0[1] = x;                                  // v1 = x
         ok  &= std::fabs( v0[1] - 0.5) < 1e-10;

         v0[2] = 1. + v0[1];                         // v2 = 1 + v1
         ok  &= std::fabs( v0[2] - 1.5) < 1e-10;

         v0[3] = v0[1] * v0[1];                      // v3 = v1 * v1
         ok  &= std::fabs( v0[3] - 0.25) < 1e-10;

         v0[4] = v0[3] / 2.;                         // v4 = v3 / 2
         ok  &= std::fabs( v0[4] - 0.125) < 1e-10;

         v0[5] = v0[2] + v0[4];                      // v5  = v2 + v4
         ok  &= std::fabs( v0[5] - 1.625) < 1e-10;

         return ok;
    }
    bool exp_2_for0(void)
    {    double v0[6];
         return exp_2_for0(v0);
    }

`

Input File: introduction/exp_apx/exp_2_for0.cpp