Question

In C++, modify the bmr program to save its output to a file.

The program, after asking the user all the necessary information to calculate
the calories, should do the following:

a. ask for the filename
b. open the filename as an ofstream
c. save the data (the same data you sent to cout) to the file
d. close the file
e. print a message saying that you saved to the file.

If using windows, you might try having the program open the file in notepad,
as demonstrated in the lecture. With something like

system(fname.c_str());

Answer 1

If yo u have any doubts, please give me comment...

#include<iostream>

#include<fstream>

#include<string>

#include<cctype>

using namespace std;

int main(){

int age;

char gender;

double height, weight;

cout<<"Enter your age: ";

cin>>age;

cout<<"Enter gender(M: Male, W:Women):";

cin>>gender;

gender = toupper(gender);

while(gender!='M' && gender!='W'){

cout<<"Invaid gender: Reenter: ";

cin>>gender;

gender = toupper(gender);

}

cout<<"Enter your height(in cm's): ";

cin>>height;

cout<<"Enter your weight(in kg's): ";

cin>>weight;

double bmr;

if(gender=='M')

bmr = 66.47 + (13.7*weight)+(5*height)-(6.8*age);

else

bmr = 655.1+(9.6*weight)+(1.88*height)-(4.7*age);

// cout<<"Calories: "<<bmr<<endl;

string filename;

cout<<"Enter filename to save results: ";

cin>>filename;

ofstream out;

out.open(filename.c_str());

out<<"Age:\t"<<age<<endl;

out<<"Gender:\t"<<gender<<endl;

out<<"Height:\t"<<height<<" cm"<<endl;

out<<"Weight:\t"<<weight<<" kg"<<endl;

out<<"\nCalories:"<<bmr<<endl;

out.close();

cout<<"Succcessfully results saved into "<<filename<<endl;

return 0;

}