C++ Primer Plus

Function Variations

Some functions require more than one item of information. These functions use multiple arguments separated by commas. For example, the math function pow() takes two arguments and returns a value equal to the first argument raised to the power given by the second argument. It has this prototype:

double pow(double, double);  // prototype of a function with two arguments

If, say, you wanted to find 5⁸ (5 to the eighth power), you would use the function like this:

answer = pow(5.0, 8.0);      // function call with a list of arguments

Other functions take no arguments. For example, one of the C libraries (the one associated with the cstdlib or the stdlib.h header file) has a rand() function that has no arguments and that returns ...