c++求方程f(x)=2^x+3^x-4^x=0在[1，2]内的根，精确到10位小数

以下是使用C++求解方程f(x) = 2^x + 3^x - 4^x = 0在[1, 2]内的根，精确到10位小数的代码示例：

#include <iostream>
#include <cmath>

double func(double x) {
    return pow(2, x) + pow(3, x) - pow(4, x);
}

double bisection(double left, double right) {
    double middle;
    while (fabs(right - left) > 1e-10 || fabs(func(middle)) > 1e-10) {
        middle = (left + right) / 2;
        if (func(middle) * func(right) < 0) {
            left = middle;
        }
        else if (func(middle) * func(left) < 0) {
        right = middle;
        }
    }
    return right;
}

int main() {
    double root = bisection(1, 2);
    std::cout.precision(10);
    std::cout << "The root of the equation f(x) = 2^x + 3^x - 4^x = 0 in the interval [1, 2] is: " << root << std::endl;
    return 0;
}