Question

C++,输入体重,身高,算bmi

Answer 1

#include

#include

#include

using namespace std;

class person {//新建人物类

public:

person();

~person();

void setname(string inputname){

name=inputname;

}

string getname(){

return name;

}

void setbmi(double bmi){

person::bmi=bmi;

}

double getbmi(){

return bmi;

}

private:

string name;//姓名

double bmi;//BMI

};

person::person(){

}

int main(){

person* p1=new person();//人物对象

string text1 = "Type your first name (with no space):";

string text2 = "Type metric for metric system, type standard for standard system:";

string input;

string weight,height;

double bmi;

int choice;

bmi=0.0;

cout<

cin>>input;

p1->setname(input);

cout<

cin>>input;

if(input=="standard")//判断属于那种system

choice=0;

else if (input=="metric")

choice=1;

else if (input=="unknow")

choice=2;

switch(choice){

case 0:

cout>weight>>height;

bmi=((atof((weight.c_str())))/((atof(height.c_str()))*(atof(height.c_str()))))*703;//计算bmi

p1->setbmi(bmi);

break;

case 1:

cout>weight>>height;

bmi=(atof(weight.c_str()))/((atof(height.c_str()))*(atof(height.c_str())));

p1->setbmi(bmi);

break;

case 2:

cout>weight>>height;

bmi=((atof((weight.c_str())))/((atof(height.c_str()))*(atof(height.c_str()))))*703;

p1->setbmi(bmi);

break;

}

cout<

getname()

cout<

getname()getbmi()<18.5){//判断category

cout<}

else if(p1->getbmi()<25.0){

cout<}

else if(p1->getbmi()<30.0){

cout<}

else {

cout<}

}基本上行了,你试试,至于system和category,system是关键字,不过用不上,category可以弄成一个变量,我这里没用,也没必要.