funct_add

#include <iostream>
using namespace std;

int timesTwo(int x,int y) 
{
    return x*y*2;
}

int main() {
    cout << timesTwo(1,8) << endl;

    cout <<timesTwo(2,5) << endl;

    cout <<timesTwo(42,0) << endl;
}
/*
Output:
16
20
0
*/


// function add numbers
#include <iostream>
using namespace std;

int addNumbers(int x, int y) {
    int result = x + y;
    return result;
}

int main() 
{
  cout << addNumbers(50, 25);

  int x = addNumbers(35, 7);
  cout << x;
  // Outputs 42
}

// function add numbers with cin
#include<iostream>
using namespace std;

int sum_nums(int x, int y) 
{
    return x + y;
}

int main() 
{
int x=x;
int y=y;
cin >> x;
cin >> y;

int answer = sum_nums(x, y);
    
    cout << answer << endl;
}
// with cin & cout
//function means simply writing code once and using as many as u need....one simple programme is ADD WITH FUNCTION.
#include<iostream>
using namespace std;
/*creating a function*/

int sum (int a,int b);
    int c;
    c=a+b;
return c;

/*means it will return c value */
/*now main func*/
int main()
{
cout<<sum(5,6)<<endl;
cout<<sum(6,4)<<end;
return 0;
}
/*OUTPUT:
11
10
*/

///// cin & sum
#include <iostream>
using namespace std;

void calculator(int x, int y) 
{

int sum = x + y;
cout << "Your sum is " << sum;
}

int main() 
{
cout << "Hello, please input your numbers" << endl;
int x1, y1;
cin >> x1 >> y1;
calculator(x1, y1); // connection x,y und x1,y1 beachten
return 0;
}