My implementation of mathematical formula returns different value than calculator-CodePudding

using namespace std;

#include <iostream>
#define _USE_MATH_DEF
#include <conio.h>
#include <cmath>

int main()
{
    const double e = 2.71;
    double x, a, b, c, A, B, C, M;

    cout << "Enter the value of x, a, b and c:  ";
    cin >> x >> a >> b >> c;

    A = x   pow(sqrt(x   a), 3);
    // cout << A;
    B = x - sqrt((abs(x - b)));
    // cout << B;
    C = A / B;
    M = pow(e, -1 * c) * C;

    cout << "The result of function is " << M;

    _getch();
    return 0;
}

For example, lets define x=1, a=4, b=5, c=1.
Calculator returns M as -0.9547605358, but code calculates M as -4.49459.

This is mathematical formula that I need to code:

CodePudding user response：

Here I see some problems, namely A must be

A = x   pow(sqrt(x   a), 1.0/3.0);

B and C definition is correct, but M must be

M = pow(e, -1 * c * x) * C;

I would also like to point out that conio.h is a non standard header file and _getch() is non standard.