write a program to find a root of non linear equation using Bisection method in c++.

write a program to find a root of non linear equation using Bisection method in c++.

Source Code:

/********************************************
    program: solution of non-linear equation
                    bisection method
    language: C
    Author : Tanveer Khan
    Rajasthan University, Jaipur
************************************************/
#include<stdio.h>
#include<math.h>

//function that returns the functional value
float func(float x){
    return (pow(x,3)+5*pow(x,2)-7);
}

int main(){
    float up_range, low_range, mid;
    int i = 0; //no of iteration
    printf("Enter the range: ");
    scanf("%f%f",&up_range,&low_range);
    while(func(up_range)*func(low_range) > 0){ //repeatadly read until the range has root
        printf("\nThis range doesnot contains any root");
        printf("\nEnter again the range: ");
        scanf("%f%f",&up_range,&low_range);
    }
    do{
        mid = (up_range + low_range) / 2;
        if(func(low_range) * func(mid) < 0){ //if signs of mid and low_range is
            up_range = mid;                  //different, replace up_range by mid
        }else{ //else raplace, low_range by mid
            low_range = mid;
        }
        i++;
        printf("\nAt iteration: %d, root = %f",i,mid);
    }while(fabs(func(mid))> 0.0001);

    printf("\nThe root of the equation is %f", mid);
    return 0;
}


output: