BMI

// xcode
// paulogp

#include <stdio.h>

float bmi (float the_weight, float the_height);

float bmi (float the_weight, float the_height)
{
    // BMI = (Weight in Kilograms / (Height in Meters x Height in Meters))
    float the_bmi = -1;

    if ((the_weight > 0) && (the_weight < 700) && (the_height > 0) && (the_height < 4.0))
    {
        the_bmi = the_weight / (the_height * the_height);
    }

    return the_bmi;
}

int main (int argc, const char * argv[])
{
    printf("BMI\n");

    float the_weight, the_height, the_result;

    printf("weight (kg): ");
    scanf("%f", &the_weight);

    printf("height (m): ");
    scanf("%f", &the_height);

    the_result = bmi (the_weight, the_height);

    if (the_result != -1)
    {
        if (the_result <= 18.5) printf("underweight\n");
        if ((the_result > 18.5) && (the_result < 25)) printf("normal weight\n");
        if ((the_result >= 25) && (the_result < 30)) printf("overweight\n");
        if ((the_result >= 30) && (the_result < 35)) printf("obese 1\n");
        if ((the_result >= 35) && (the_result < 40)) printf("obese 2\n");
        if (the_result >= 40) printf("extremely obese\n");
    }

    return 0;
}