5-7장 과제 정답 예시

main.c

#include <stdio.h>

int main()
{
    int len = 0;
    double weights[5], heights[5];
    int maxlen = sizeof weights / sizeof(double);

    printf("0: Add a member\n");
    printf("Other than 0: Calculate BMI\n");

    while (1)
    {
        printf(": ");
        int cmd; scanf("%d", &cmd);
        if (!cmd)
        {
            do
            {
                printf("Weight: ");
                scanf("%lf", weights + len);
            } while (weights[len] <= 0);

            do
            {
                printf("Height: ");
                scanf("%lf", heights + len);
            } while (heights[len] <= 0);
            ++len;

            if (len == maxlen)
            {
                break;
            }
        }
        else
        {
            break;
        }
    }

    if (!len)
    {
        printf("No output\n");
    }
    else for (int i = 0; i < len; ++i)
    {
        int ord = i + 1;
        double weight = weights[i], height = heights[i], bmi = weight / (height * height / 10000);

        printf("\n%d", ord);
        if (ord == 1)
            printf("st");
        else if (ord == 2)
            printf("nd");
        else if (ord == 3)
            printf("rd");
        else
            printf("th");

        printf(" member\nWeight: %lf\nHeight: %lf\nBMI: %lf\n", weight, height, bmi);

        if (20 <= bmi && bmi < 25)
            printf("Good\n");
        else
            printf("Bad\n");
    }
}