Write a function so that the main() code below can be replaced by the simpler code that calls function original main():

int main() {
double milesperhour;
double minutestraveled;
double hourstraveled;
double milestraveled;

cin > > milesperhour;
cin > > minutestraveled;

hourstraveled = minutestraveled / 60.0;
milestraveled = hourstraveled * milesperhour;
cout < < "miles: " < < milestraveled < < endl; return 0;
}
#include
using namespace std;
// write your answer here.
int main() {
double milesperhour;
double minutestraveled;

cin > > milesperhour;
cin > > minutestraveled;

cout < < "miles: " < < mphandminutestomiles(milesperhour, minutestraveled) < < endl;
return 0;
}

The program illustrates the use of functions.

Functions are used to group similar set of instructions together in order to achieve a specific outcome.

The required function is as follows:

double MphAndMinutesToMiles(double milesPerHour, double minutesTraveled){

   return milesPerHour * minutesTraveled/60;

}

The first line of the function declares the function, and its parameters.

double MphAndMinutesToMiles(double milesPerHour, double minutesTraveled)

The second line of the function calculates the miles traveled, and returns it back to main().

   return milesPerHour * minutesTraveled/60;

See attachment for complete program and the sample run

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The program to this question can be given as:

Program:

#include <iostream> //header file

using namespace std; //using namespace

double MphAndMinutesToMiles(double milesPerHour, double minutesTraveled) //defining method

{

return (minutesTraveled/ 60.0)*milesPerHour; //return value.

}

int main() //defining main method

{

double milesPerHour,minutesTraveled; //define variable

cout<<"Enter miles per hour :";  

cin >> milesPerHour;  

cout<<"Enter travelling minutes :";

cin >> minutesTraveled;

cout << "Miles: "<< MphAndMinutesToMiles(milesPerHour, minutesTraveled)<< endl;

return 0;

}

Output:

Enter miles per hour :12

Enter travelling minutes :20

Miles: 4

Explanation:

The explanation of the above C++ program can be given as: