exp_2: Verify First Order Forward Sweep
Keywords: exp_2: verify first order forward sweep exp_2

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exp_2: Verify First Order Forward Sweep
`

    # include <cmath>                   // prototype for fabs
    extern bool exp_2_for0(double *v0); // computes zero order forward sweep
    bool exp_2_for1(double *v1)         // double v1[6]
    {    bool ok = true;
         double v0[6];

         // set the value of v0[j] for j = 1 , ... , 5
         ok &= exp_2_for0(v0);

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

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

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

         v1[4] = v1[3] / 2.;                             // v4 = v3 / 2
         ok    &= std::fabs( v1[4] - 0.5) <= 1e-10;

         v1[5] = v1[2] + v1[4];                          // v5 = v2 + v4
         ok    &= std::fabs( v1[5] - 1.5) <= 1e-10;

         return ok;
    }
    bool exp_2_for1(void)
    {    double v1[6];
         return exp_2_for1(v1);
    }

`

Input File: introduction/exp_apx/exp_2_for1.cpp