Handling an array parameter as a pointer : function parameters « Function « C++ Tutorial

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C++ Tutorial » Function » function parameters

7.3.18.Handling an array parameter as a pointer

#include <iostream>

using std::cout;

using std::endl;



double average(double* array, int count);     



int main() {

  double values[] = {1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0};



  cout << "Average = "<< average(values, (sizeof values)/(sizeof values[0]))<< endl;



  return 0;

}



double average(double* array, int count) {

  double sum = 0.0;                           

  for(int i = 0 ; i < count ; i++)

    sum += *array++;                          

  return sum/count;                           

}

Average = 5.5

7.3.function parameters
	7.3.1.	Passing int by value
	7.3.2.	Define function to accept three int parameters
	7.3.3.	Pass a pointer to a function.
	7.3.4.	Pass variable address to a function
	7.3.5.	Pass int array to a function
	7.3.6.	Declare int array parameter for a function without indicating the array length
	7.3.7.	Function parameter: Use int pointer to accept an array
	7.3.8.	Use array as function's parameter
	7.3.9.	Change the contents of an array using a function
	7.3.10.	Pass a string to a function: Invert the case of the letters within a string
	7.3.11.	Change a call-by-value parameter does not affect the argument
	7.3.12.	Demonstrate the pointer version of swap(): Exchange the values of the variables pointed to by x and y
	7.3.13.	Using reference parameters
	7.3.14.	Passing a two-dimensional array to a function
	7.3.15.	Passing an array to a function
	7.3.16.	var args has to be the last one
	7.3.17.	the use of ... and its support macros va_arg, va_start, and va_end
	7.3.18.	Handling an array parameter as a pointer

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