Well… this mastery is about input and output, for this points this  is reaaaalllyyy easy so, I will leave a code with an example:

—————–

#include <iostream>
using namespace std;

int x ;

float doublemoney (float x) {
return x + x ;
}

int main () {
float x;
cout <<“Enter the money you want to double: “;
cin>> x;
int y= doublemoney(x) ;
cout <<“Here is the new value for your money: “<< y << endl;
return 0;
}

 

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cin>> is when the user will enter something

cout << is when you write something and it will show to the user.

 

#mastery10

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