[C언어 #40] 표준체중 비만도 (obesity) 구하기

c언어 표준체중 계산하여 구하기 및 비만도 분류

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Calculate standard weight and classify obesity

/* Classify Obesity */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <ctype.h>
 
// Use integer constants to represent classes
enum type    { MEN, WOMEN, INVALID };
enum obesity { Severe_Underweight, Underweight, Normal, Overweight, Obese, Invalid };
 
// Type Male, Female validity
int classifyType(int n, const char t[]) {
    if (n == 1)
        if (t[0] == 'm' || t[0] == 'M') return MEN;
        if (t[0] == 'w' || t[0] == 'W') return WOMEN;
    return INVALID;
}
 
// Convert type to integer
int convertType(int n, const char t[]) {
    return classifyType(n, t);
}
 
// Check height, weight input
bool isValid(int n, const char input[]) {
    if (n > 8) return false;
    int count = 0;
    for (int i = 0; input[i] != '\0'; i++) {
        if (!isdigit(input[i])) {
            if (input[i] == '.') {
                count += 1;
                if (count > 1) return false;
            } else {
                return false;
            }
        }
    }
    return true;
}
 
// Convert string to double
double convert(int n, const char input[]) {
    return isValid(n, input) ? atof(input) : -1;
}
 
// Check height validity
bool isHeightValid(double height) {
    bool b = height <= 350 && height >= 120;
    return b;
}
 
// Check weight validity
bool isWeightValid(double weight) {
    bool b = weight <= 350 && weight >= 30;
    return b;
}
 
// Calculate standard weight
double getStdWeight(int type, double height) {
    int stdWeight;    
    if (type == MEN)     stdWeight = (height - 80) * 0.7;
    if (type == WOMEN)   stdWeight = (height - 70) * 0.6;
    if (type == INVALID) stdWeight = -1;
    return stdWeight;
}
 
// Classify obesity using weight and standard weight
int classifyObesity(double weight, double stdWeight) {
    if (weight <= stdWeight * 0.8) return Severe_Underweight;
    if (weight <= stdWeight * 0.9) return Underweight;
    if (weight <= stdWeight * 1.1) return Normal;
    if (weight <= stdWeight * 1.2) return Overweight;
    else return Obese;
}
 
// Print result
void printResult(int type, double height, double weight, double stdWeight, int obesity) {
    switch (obesity) {
        case Severe_Underweight:
            printf("You are 'Severly Underweight' !!\n");
            break;
        case Underweight:
            printf("You are 'Underweight' !!\n");
            break;
        case Normal:
            printf("You are 'Normal' !!\n");
            break;
        case Overweight:
            printf("You are 'Overweight' !!\n");
            break;
        case Obese:
            printf("You are 'Obese' !!\n");
            break;
    }
    
    switch (type) {
        case MEN:
            printf("Sex: Male, ");
            break;
        case WOMEN:
            printf("Sex: Female, ");
            break;
    }
 
    printf("Height: %.2f (cm), Weight: %.2f (kg), Standard Weight: %.1f (kg)\n", height, weight, stdWeight);
}
 
// ---------------------------------------------------------------------------------------------
// Testing
 
void testHeightValid() {
    if (isHeightValid(70.11)) printf("true\n");
    else printf("false\n");
    if (isHeightValid(17)) printf("true\n");
    else printf("false\n");
    if (isHeightValid(1)) printf("true\n");
    else printf("false\n");
    if (isHeightValid(350)) printf("true\n");
    else printf("false\n");
    if (isHeightValid(177.78)) printf("true\n");
    else printf("false\n");
    if (isHeightValid(-1)) printf("true\n");
    else printf("false\n");
}
 
void testStdWeight() {
    double stdWeight;
    stdWeight = getStdWeight(0, 178.11);
    printf("%.4f\n", stdWeight);
    stdWeight = getStdWeight(0, 120);
    printf("%.4f\n", stdWeight);
    stdWeight = getStdWeight(0, 350);
    printf("%.4f\n", stdWeight);
    stdWeight = getStdWeight(1, 157.11);
    printf("%.4f\n", stdWeight);    
    stdWeight = getStdWeight(1, 130);
    printf("%.4f\n", stdWeight);
    stdWeight = getStdWeight(1, 155);
    printf("%.4f\n", stdWeight);
}
 
void test() {
    testHeightValid();
    printf("Test Height, Weight validity passed\n");
    
    testStdWeight();
    printf("Test Standard Weight passed\n");
}
// ---------------------------------------------------------------------------------------------
 
// Run
int main(int n, char *args[n]) {
    setbuf(stdout, NULL);
    if (n == 1) {
        test();
        printf("\n");
        printf("Try: .\\standardweight3 Sex (m, w) Height (cm) Weight (kg)\n");
        printf("ex.  .\\standardweight3 m 178.12 70.45\n");
        return 0;
    }
 
    // Get type from input
    int type = convertType(strlen(args[1]), args[1]);
    if (type == INVALID) {
        printf("Invalid Sex type !!\n");
        printf("ex.  .\\standardweight3 m 178.12 70.45\n");
        return 1;
    }
 
    // Get height, weight from input
    double height = convert(strlen(args[2]), args[2]);
    double weight = convert(strlen(args[3]), args[3]);
 
    if (!isHeightValid(height) || !isWeightValid(weight)) {
        printf("Invalid Height or Weight !!\n");
        printf("120 < Height (cm) < 350\n");
        printf(" 30 < Weight (kg) < 350\n");
        return 1;
    }
 
    // Get standard weight
    double stdWeight = getStdWeight(type, height);
 
    // Get Obesity from height, weight
    int obesityClass = classifyObesity(weight, stdWeight);
 
    // Print result (sex, height, weight, standard weight, obesity)
    printResult(type, height, weight, stdWeight, obesityClass);
}