C++ Program for Regula Falsi Method

C++ program for regula falsi method. This page provides program for regula falsi method in c++ language. To understand regula falsi method with definition, formula, example, graph, theory, advantages and disadvantages, application read Regula Falsi Method.

Example: Regula Falsi Method in C++

#include<bits/stdc++.h> 
using namespace std; 
#define MAX_ITER 1000000

double func(double x) 
{ 
    return x*x*x - x*x + 2; 
} 
  
void regula_falsi(double number1, double number2) 
{ 
    if (func(number1) * func(number2) >= 0) 
    { 
        cout << "You have not assumed right number1 and number2\n"; 
        return; 
    } 
  
    double root = number1;
  
    for (int i=0; i < MAX_ITER; i++) 
    { 
        c = (number1*func(number2) - number2*func(numnber1))/ (func(number2) - func(number1)); 
  
        if (func(c)==0) 
            break; 
  
        else if (func(c)*func(a) < 0) 
            number2 = root; 
        else
            number1 = root; 
    } 
    cout << "The value of root is : " << root; 
} 
  
int main() 
{ 
    double number1 =-200, number2 = 300; 
    regula_falsi(a, b); 
    return 0; 
}

Output:

The value of root is : -1

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