Alogarithm steps:

1. Start the program
2. Write the function and pass one value through that function
3. Call that function in the main program
4. Pass the value when we call that function
5. Compile and run the program

CPP Program For Call By Value

#include void doubleIt(int); int main () { int num; cout << "Enter number: "; cin >> num; doubleIt(num); cout << "The number doubled in main is " << num << endl; return 0; } void doubleIt (int x) { cout << "The number to be doubled is " << x << endl; x *= 2; cout << "The number doubled in doubleIt is " << x << endl; }