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Yegorsh/Secant_method.cpp

Last active January 5, 2022 21:09
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Revisions

  1. Yegorsh revised this gist Jan 5, 2022. No changes.
  2. Yegorsh revised this gist Dec 21, 2021. No changes.
  3. Yegorsh created this gist Dec 21, 2021.
    34 changes: 34 additions & 0 deletions Secant_method.cpp
    View file
    Original file line number Diff line number Diff line change
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    #include <iostream>
    #include <math.h>
    using namespace std;

    double foo(double x){
    return log(x) - 5;
    }

    double SecantMethod(double x0, double x1, const double epsilon){
    double x2;
    do {
    x2 = x0 - ((foo(x0) * (x1 - x0)) / (foo(x1) - foo(x0)));
    x0 = x1;
    x1 = x2;
    } while (fabs(x1 - x0) > epsilon);
    return x2;
    }

    int main(){
    double eps = 0.0000001;
    double x0, x1;
    cout << "x0 = ";
    cin >> x0;
    cout << "x1 = ";
    cin >> x1;
    if (foo(x0) * foo(x1)>0){
    cout << "F(x0)*F(x1)>0!";
    exit(0);
    }

    cout << SecantMethod(x0, x1, eps);

    return 0;
    }