Next: Example Function: Raising to Up: Introduction to User-defined functions Previous: Functions that return values

Example function: sum of squares of integers

The following function returns the sum of the squares of the first n integers when it is called with parameter n.

// This function returns the sum of squares of the
// first n integers
int sumsq(int n)
  {
    int sum = 0;
    int i;
    for (i = 1; i <= n; i++)
        sum += i * i;

    return sum;
  } // End of sumsq
Download program.
A typical use of sumsq is:
float sumsquare;
int number;
cout << "Enter number (>= 0): ";
cin >> number;
sumsquare = sumsq(number);


Next: Example Function: Raising to Up: Introduction to User-defined functions Previous: Functions that return values