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C++ SymEngine::integer方法代码示例

本文整理汇总了C++中SymEngine::integer方法的典型用法代码示例。如果您正苦于以下问题：C++ SymEngine::integer方法的具体用法？C++ SymEngine::integer怎么用？C++ SymEngine::integer使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类SymEngine的用法示例。


在下文中一共展示了SymEngine::integer方法的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: main

int main(int argc, char *argv[])
{
    SymEngine::print_stack_on_segfault();
    int N;
    if (argc == 2) {
        N = std::atoi(argv[1]);
    } else {
        N = 20;
    }

    RCP<const Basic> x = symbol("x"), y = symbol("y"), e, f;
    e = pow(add(one, add(mul(sqrt(integer(3)), x), mul(sqrt(integer(5)), y))),
            integer(N));
    f = mul(e, add(e, sqrt(integer(7))));
    auto t1 = std::chrono::high_resolution_clock::now();
    f = expand(f);
    auto t2 = std::chrono::high_resolution_clock::now();

    std::cout << std::chrono::duration_cast<std::chrono::milliseconds>(t2 - t1)
                     .count()
              << "ms" << std::endl;
    // std::cout << f->__str__() << std::endl;

    return 0;
}
开发者ID:Nitin216，项目名称:symengine，代码行数:25，代码来源:expand7.cpp

示例2: expand

RCP<const Basic> hermite(RCP<const Integer> n, RCP<const Basic> y)
{
    if (eq(*n, *one)) return mul(y, integer(2));
    if (eq(*n, *zero)) return one;
    return expand(sub(mul(mul(integer(2), y), hermite(n->subint(*one), y)),
        mul(integer(2), mul(n->subint(*one), hermite(n->subint(*integer(2)), y)))));
}
开发者ID:SHIVAPRASAD96，项目名称:symengine，代码行数:7，代码来源:symbench.cpp

示例3: R8

double R8()
{
    RCP<const Basic> x = symbol("x");
    auto t1 = std::chrono::high_resolution_clock::now();
    x = right(pow(x, integer(2)), integer(0), integer(5), x, 10000);
    auto t2 = std::chrono::high_resolution_clock::now();
    return std::chrono::duration_cast<std::chrono::nanoseconds>(t2-t1).count()/1000000000.0;
}
开发者ID:SHIVAPRASAD96，项目名称:symengine，代码行数:8，代码来源:symbench.cpp

示例4: mulnum

RCP<const Basic> right(const RCP<const Basic> &f, const RCP<const Number> &a,
                       const RCP<const Number> &b, const RCP<const Basic> &x, int n)
{
    RCP<const Number> Deltax = b->sub(*a)->div(*integer(n));
    RCP<const Number> c = a;
    RCP<const Number> est = integer(0);
    for (int i = 0; i < n; i++) {
        iaddnum(outArg(c), Deltax);
        iaddnum(outArg(est), rcp_static_cast<const Number>(f->subs({{x, c}})));
    }
    return mulnum(est, Deltax);
}
开发者ID:SHIVAPRASAD96，项目名称:symengine，代码行数:12，代码来源:symbench.cpp

示例5: B

double B()
{
    RCP<const Number> s = integer(0);

    auto t1 = std::chrono::high_resolution_clock::now();
    for (int i = 1; i <= 1000; i++) {
        s = s->add(*one->div(*integer(i)));
    }
    auto t2 = std::chrono::high_resolution_clock::now();

    return std::chrono::duration_cast<std::chrono::nanoseconds>(t2-t1).count()/1000000000.0;
}
开发者ID:SHIVAPRASAD96，项目名称:symengine，代码行数:12，代码来源:lwbench.cpp

示例6: main

int main(int argc, char* argv[])
{
    print_stack_on_segfault();
    RCP<const Basic> x = symbol("x");
    RCP<const Basic> y = symbol("y");
    RCP<const Basic> z = symbol("z");
    RCP<const Basic> w = symbol("w");
    RCP<const Basic> i15 = integer(15);

    RCP<const Basic> e, f1, f2, r;

    e = pow(add(add(add(x, y), z), w), i15);
    f1 = expand(e);
    f2 = expand(add(e, w));

    umap_basic_num syms;
    insert(syms, x, integer(0));
    insert(syms, y, integer(1));
    insert(syms, z, integer(2));
    insert(syms, w, integer(3));

    umap_vec_mpz P1, P2, C;

    expr2poly(f1, syms, P1);
    expr2poly(f2, syms, P2);
    std::cout << "poly_mul start" << std::endl;
    auto t1 = std::chrono::high_resolution_clock::now();
    poly_mul(P1, P2, C);
    auto t2 = std::chrono::high_resolution_clock::now();
    std::cout << "poly_mul stop" << std::endl;


    /*
    std::cout << *e << std::endl;
    std::cout << *f1 << std::endl;
    std::cout << P1 << std::endl;
    std::cout << *f2 << std::endl;
    std::cout << P2 << std::endl;
    std::cout << "RESULT:" << std::endl;
    std::cout << C << std::endl;
    */
    std::cout
        << std::chrono::duration_cast<std::chrono::milliseconds>(t2-t1).count()
        << "ms" << std::endl;
    std::cout << "number of terms: "
        << C.size() << std::endl;



    return 0;
}
开发者ID:cbehan，项目名称:symengine，代码行数:51，代码来源:expand2b.cpp

示例7: C

double C()
{
    RCP<const Integer> x = integer(13*17*31);
    RCP<const Integer> y = integer(13*19*29);

    auto t1 = std::chrono::high_resolution_clock::now();
    for (int i = 1; i <= 200; i++) {
        gcd(*rcp_static_cast<const Integer>(pow(x, integer(300 + i%181))),
            *rcp_static_cast<const Integer>(pow(y, integer(200 + i%183))));
    }
    auto t2 = std::chrono::high_resolution_clock::now();

    return std::chrono::duration_cast<std::chrono::nanoseconds>(t2-t1).count()/1000000000.0;
}
开发者ID:SHIVAPRASAD96，项目名称:symengine，代码行数:14，代码来源:lwbench.cpp

示例8: main

int main(int argc, char* argv[])
{
    SymEngine::print_stack_on_segfault();

    RCP<const Basic> e = sin(integer(1));
    double r, r_exact;

    for(int i = 0; i < 10000; i++)
        e = pow(add(mul(add(e, pow(integer(2), integer(-3))), integer(3)), integer(1)), div(integer(2), integer(3)));

//  Too long:
//  std::cout << "Evaluating: " << *e << std::endl;

    auto t1 = std::chrono::high_resolution_clock::now();
    for (int i = 0; i < 500; i++)
        r = eval_double(*e);
    auto t2 = std::chrono::high_resolution_clock::now();
    std::cout
        << std::chrono::duration_cast<std::chrono::milliseconds>(t2-t1).count()
        << "ms" << std::endl;
/*
In SymPy for few iterations:
In [7]: sympify("(1 + 3*(1/8 + (1 + 3*(1/8 + (1 + 3*(1/8 + (1 + 3*(1/8 + (1 + 3*(1/8 + sin(1)))^(2/3)))^(2/3)))^(2/3)))^(2/3)))^(2/3)").n(20)
Out[7]: 8.0152751504518535013

//    r_exact = 8.0152751504518535013;

Here is code to use SymPy for more iterations:

In [5]: e = sin(1)

In [6]: for i in range(10):
   ...:     e = ((e+2**(-S(3)))*3 + 1)**(S(2)/3)
   ...:

In [7]: e.n(20)
Out[7]: 9.6473976427977306146

But unfortunately SymPy can't do more than perhaps 10 or 20 iterations, while
we need to test ~10000. However, the numbers seem to converge to 9.85647...

*/
    r_exact = 9.8564741713701043569;
    std::cout << "r (double) = " << r << std::endl;
    std::cout << "r (exact)  = " << r_exact << std::endl;
    std::cout << "error      = " << std::abs(r-r_exact) << std::endl;

    return 0;
}
开发者ID:SHIVAPRASAD96，项目名称:symengine，代码行数:49，代码来源:eval_double1.cpp

示例9: E

double E()
{
    RCP<const Basic> s = integer(0);
    RCP<const Basic> y = symbol("y");
    RCP<const Basic> t = symbol("t");

    auto t1 = std::chrono::high_resolution_clock::now();
    for (int i = 1; i <= 10; i++) {
        s = add(s, div(mul(integer(i), mul(y, pow(t, integer(i)))),
                    pow(add(y, mul(integer(abs(5 - i)), t)), integer(i))));
    }
    auto t2 = std::chrono::high_resolution_clock::now();

    return std::chrono::duration_cast<std::chrono::nanoseconds>(t2-t1).count()/1000000000.0;
}
开发者ID:SHIVAPRASAD96，项目名称:symengine，代码行数:15，代码来源:lwbench.cpp

示例10: main

int main(int argc, char* argv[])
{
    Teuchos::print_stack_on_segfault();

    RCP<const Basic> x = symbol("x");
    RCP<const Basic> y = symbol("y");
    RCP<const Basic> z = symbol("z");
    RCP<const Basic> w = symbol("w");
    RCP<const Basic> i100 = integer(100);

    RCP<const Basic> e, r;

    e = pow(add(add(pow(x, y), pow(y, x)), pow(z, x)), i100);

    std::cout << "Expanding: " << *e << std::endl;

    auto t1 = std::chrono::high_resolution_clock::now();
    r = expand(e);
    auto t2 = std::chrono::high_resolution_clock::now();
    //std::cout << *r << std::endl;
    std::cout
        << std::chrono::duration_cast<std::chrono::milliseconds>(t2-t1).count()
        << "ms" << std::endl;
    std::cout << "number of terms: "
        << rcp_dynamic_cast<const Add>(r)->dict_.size() << std::endl;

    return 0;
}
开发者ID:cbehan，项目名称:symengine，代码行数:28，代码来源:expand3.cpp

示例11: main

int main(int argc, char* argv[])
{
    SymEngine::print_stack_on_segfault();

    RCP<const Basic> x = symbol("x");
    RCP<const Basic> y = symbol("y");
    RCP<const Basic> z = symbol("z");
    RCP<const Basic> w = symbol("w");
    RCP<const Basic> i15 = integer(15);

    RCP<const Basic> e, f, r;

    e = pow(add(add(add(x, y), z), w), i15);
    f = mul(e, add(e, w));

    std::cout << "Expanding: " << *f << std::endl;

    auto t1 = std::chrono::high_resolution_clock::now();
    r = expand(f);
    auto t2 = std::chrono::high_resolution_clock::now();
    //std::cout << *r << std::endl;
    std::cout
        << std::chrono::duration_cast<std::chrono::milliseconds>(t2-t1).count()
        << "ms" << std::endl;
    std::cout << "number of terms: "
        << rcp_dynamic_cast<const Add>(r)->dict_.size() << std::endl;

    return 0;
}
开发者ID:rohanaru53，项目名称:symengine，代码行数:29，代码来源:expand2.cpp

示例12: R1

double R1()
{
    RCP<const Basic> g;
    RCP<const Basic> h = div(I, integer(2));
    auto t1 = std::chrono::high_resolution_clock::now();
    g = expand(f(f(f(f(f(f(f(f(f(f(h)))))))))));
    auto t2 = std::chrono::high_resolution_clock::now();
    return std::chrono::duration_cast<std::chrono::nanoseconds>(t2-t1).count()/1000000000.0;
}
开发者ID:SHIVAPRASAD96，项目名称:symengine，代码行数:9，代码来源:symbench.cpp

示例13: test_expand

void test_expand()
{
    RCP<const Basic> x = symbol("x");
    RCP<const Basic> y = symbol("y");
    RCP<const Basic> z = symbol("z");
    RCP<const Basic> w = symbol("w");
    RCP<const Basic> i4 = integer(2);

    RCP<const Basic> e, f1, f2, r;

    e = pow(add(add(add(x, y), z), w), i4);
    f1 = expand(e);
    f2 = expand(add(e, w));

    umap_basic_num syms;
    insert(syms, x, integer(0));
    insert(syms, y, integer(1));
    insert(syms, z, integer(2));
    insert(syms, w, integer(3));

    umap_vec_mpz P1, P2, C;

    expr2poly(f1, syms, P1);
    expr2poly(f2, syms, P2);
    std::cout << "poly_mul start" << std::endl;
    auto t1 = std::chrono::high_resolution_clock::now();
    poly_mul(P1, P2, C);
    auto t2 = std::chrono::high_resolution_clock::now();
    std::cout << "poly_mul stop" << std::endl;


    /*
    std::cout << *e << std::endl;
    std::cout << *f1 << std::endl;
    std::cout << P1 << std::endl;
    std::cout << *f2 << std::endl;
    std::cout << P2 << std::endl;
    std::cout << "RESULT:" << std::endl;
    std::cout << C << std::endl;
    */
    std::cout
        << std::chrono::duration_cast<std::chrono::milliseconds>(t2-t1).count()
        << "ms" << std::endl;
}
开发者ID:Upabjojr，项目名称:symengine，代码行数:44，代码来源:test_poly.cpp

示例14: R2

double R2()
{
    RCP<const Basic> g;
    RCP<const Integer> n = integer(15);
    RCP<const Basic> y = symbol("y");
    auto t1 = std::chrono::high_resolution_clock::now();
    g = hermite(n, y);
    auto t2 = std::chrono::high_resolution_clock::now();
    return std::chrono::duration_cast<std::chrono::nanoseconds>(t2-t1).count()/1000000000.0;
}
开发者ID:SHIVAPRASAD96，项目名称:symengine，代码行数:10，代码来源:symbench.cpp

示例15: S2

double S2()
{
    RCP<const Basic> x = symbol("x");
    RCP<const Basic> y = symbol("y");
    RCP<const Basic> z = symbol("z");
    RCP<const Basic> e;
    RCP<const Basic> f;

    e = pow(add(pow(x, sin(x)), add(pow(y, cos(y)), pow(z, add(x, y)))), integer(100));

    auto t1 = std::chrono::high_resolution_clock::now();
    f = expand(e);
    auto t2 = std::chrono::high_resolution_clock::now();
    return std::chrono::duration_cast<std::chrono::nanoseconds>(t2-t1).count()/1000000000.0;
}
开发者ID:SHIVAPRASAD96，项目名称:symengine，代码行数:15，代码来源:symbench.cpp


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