请你用c++写一个测绘程序设计的求解法方程系数的函数

下面是一个用C++写的求解法方程系数的函数的示例：

#include <iostream>
#include <cmath>

using namespace std;

void solveEquation(double x1, double y1, double x2, double y2, double x3, double y3) {
    double a, b, c;
    
    // 计算系数
    double denominator = (x1 - x2) * (x1 - x3) * (x2 - x3);
    a = (y1 * (x2 - x3) + y2 * (x3 - x1) + y3 * (x1 - x2)) / denominator;
    b = (y1 * (pow(x2, 2) - pow(x3, 2)) + y2 * (pow(x3, 2) - pow(x1, 2)) + y3 * (pow(x1, 2) - pow(x2, 2))) / denominator;
    c = (y1 * (x2 * x3 - x3 * x2) + y2 * (x3 * x1 - x1 * x3) + y3 * (x1 * x2 - x2 * x1)) / denominator;
    
    // 输出结果
    cout << "a = " << a << endl;
    cout << "b = " << b << endl;
    cout << "c = " << c << endl;
}

int main() {
    double x1, y1, x2, y2, x3, y3;
    
    // 输入三个点的坐标
    cout << "请输入第一个点的坐标(x1, y1): ";
    cin >> x1 >> y1;
    cout << "请输入第二个点的坐标(x2, y2): ";
    cin >> x2 >> y2;
    cout << "请输入第三个点的坐标(x3, y3): ";
    cin >> x3 >> y3;
    
    // 调用函数求解方程系数
    solveEquation(x1, y1, x2, y2, x3, y3);
    
    return 0;
}

该程序通过solveEquation函数来求解法方程的系数，使用了数学公式来计算系数的值。在main函数中，用户需要输入三个点的坐标，然后调用solveEquation函数来求解方程系数，并输出结果