#include <stdio.h>
#include <stdlib.h>
#include <math.h>

double sigmoid(double x)
{
     return 1 / (1 + exp(-x));
}

int main()
{
    double result;

    result = sigmoid(-10.0);

    printf("Sigmoid of -10.0: %f\n", result);

    result = sigmoid(0.0);

    printf("Sigmoid of 0.0: %f\n", result);

    result = sigmoid(10.0);

    printf("Sigmoid of 10.0: %f\n", result);

    return 0;
}

/*

Sigmoid of -10.0: 0.000045
Sigmoid of 0.0: 0.500000
Sigmoid of 10.0: 0.999955

*/