Aprogram is used to convert from minutes to seconds. write the directive for defining the conversion factor called minute_to_second_factor as a constant that cannot be changed and define it as a string 60.

I am  writing a simple program in C++ However, let me know if you need this program to be implemented in some other programming language .  

Program                      

#include <iostream>

using namespace std;

#define MINUTE_TO_SECOND_FACTOR 60

int main()

{   int minutes;

   cout<<"enter the time in minutes: ";

   cin>>minutes;

   int output;

   output = minutes * MINUTE_TO_SECOND_FACTOR;

   cout<<minutes<<" minutes =  "<<output<<" seconds.";

Output:

enter the time in minutes: 45

45 minutes = 2700 seconds

Explanation:

I will explain every line of the code .

The first statement contains a pre-processor directive which is a library that contains input and output functions for a program.The next line namespace is used so that the computer can identify cout, cin and endl used in the program.This is a define directive #define MINUTE_TO_SECOND_FACTOR 60Here define directive is used for declaring a macro  which is MINUTE_TO_SECOND_FACTOR. Here this macro is given a value 60. Now wherever in the program this macro is used, it will be replaced by 60. This macro MINUTE_TO_SECOND_FACTOR can be used as a constant and cannot be changed.Next line enters the body of the main function.variable minutes is declared which is used to store the value in minutes. variable is declared which will store the result of the conversion from minutes to seconds.output = minutes * MINUTE_TO_SECOND_FACTOR; statement works as follows:

In this statement written above the value of minutes is multiplied by 60 ( value of the macro MINUTE_TO_SECOND_FACTOR) and the result of this multiplication is stored in the output variable.

As we know that 1 minute =60 secondsLet suppose the input number is 45 minutes

                               Then output= 45 * 60

                             output= 2700 seconds.

Last statement displays the converted value of minutes into seconds which is stored in output variable.

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