# C++ 學習

###### tags: `BMI練習`

#include <iostream>
using namespace std;
 
int main() {
	char gender;
	float height,weight;
	float hf;
	float BMI;
 
	cin>>gender;
	cin>>height;
	cin>>weight;
 
	// cout << gender << "\n";
	// cout << height << "\n";
	// cout << weight << "\n";
 
	//方法1
    // hf = height/100;
    // BMI = weight/(hf*hf);
 
    //方法2
    BMI = (weight/(height*height))*10000;
 
    // cout << hf << "\n";
    cout << BMI << "\n";
 
	if(gender == 'm'){
		if(BMI < 18){
			cout << "體重過輕" << "\n";	
		}else if(BMI >= 18 && BMI < 24){
			cout << "體重標準" << "\n";
		}else if(BMI >= 24 && BMI < 27){
			cout << "體重過重" << "\n";
		}else if(BMI >= 27 && BMI < 30){
			cout << "輕度肥胖" << "\n";
		}else if(BMI >= 30 && BMI < 35){
			cout << "中度肥胖" << "\n";
		}else if(BMI >= 35){
			cout << "重度肥胖" << "\n";
		}	
	}else{
		if(BMI < 18){
			cout << "體重過輕" << "\n";	
		}else if(BMI >= 18 && BMI < 24){
			cout << "體重標準" << "\n";
		}else if(BMI >= 24 && BMI < 27){
			cout << "體重過重" << "\n";
		}else if(BMI >= 27 && BMI < 30){
			cout << "輕度肥胖" << "\n";
		}else if(BMI >= 30 && BMI < 35){
			cout << "中度肥胖" << "\n";
		}else if(BMI >= 35){
			cout << "重度肥胖" << "\n";
		}	
	}
	return 0;
}

[c++ 線上編輯器](https://ideone.com/)

//stdin
m
172
68

//stdout
22.9854
體重標準