[C언어 #40_2] 표준체중 비만도 (obesity) 구하기

c언어 표준체중 계산하여 구하기 및 비만도 분류

 

 

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 };
 
// Get input for type
void inputType(const char t[]) {
    printf("Input Type\n");
    printf("[1] Male    \n");
    printf("[2] Female  \n>>> ");
    scanf("%s", t);
}
 
// Get string input height
void getInputHeight(char height[]) {
    printf("Input Height (cm): ");
    scanf("%s", height);
}
 
// Get string input weight
void getInputWeight(char weight[]) {
    printf("Input Weight (kg): ");
    scanf("%s", weight);
}
 
// Type Male, Female validity
bool isValidType(int n, const char t[]) {
    if (n == 1)
        if (t[0] == '1' || t[0] == '2') return true;
    return false;
}
 
// Convert type to integer
int convertType(int n, const char t[]) {
    return isValidType(n, t) ? atoi(t) : -1;
}
 
// Classify type Male, Female
int classifyType(int type) {
    if (type == -1) return INVALID;
    if (type == 1)  return MEN;
    if (type == 2)  return WOMEN;
}
 
// Get Male or Female
int getType() {
    char t[20];     // Array for string input type
    int type;
 
    while (true) {
        inputType(t);   // Get input type from terminal
        type = convertType(strlen(t), t);
        if (type != -1) break;
    }
    type = classifyType(type);
    return type;
}
 
// 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;
}
 
// Get height
double getHeight() {
    char h[20];
    double height;
 
    while (true) {
        getInputHeight(h);
        height = convert(strlen(h), h);
        if (isHeightValid(height)) break;
    }
    return height;
}
 
// Get weight
double getWeight() {
    char w[20];
    double weight;
 
    while (true) {
        getInputWeight(w);
        weight = convert(strlen(w), w);
        if (isWeightValid(weight)) break;
    }
    return weight;
}
 
// 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() {
    printf("Test Height, Weight validity\n");
    testHeightValid();
    printf("Test Standard Weight\n");
    testStdWeight();
}
// ---------------------------------------------------------------------------------------------
 
void execute() {
    // Get type from input
    int type = getType();
 
    // Get height, weight from input
    double height = getHeight();
    double weight = getWeight();
    
    // 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);
}
 
// Run
int main() {
    setbuf(stdout, NULL);
    // test();
    execute();
}