prog8_06.cpp

一本语言类编程书籍

// Program 8.6 Handling an array parameter as a pointer
#include <iostream>
using std::cout;
using std::endl;

double average(double* array, int count);     // Function prototype

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

  return 0;
}

// Function to compute an average
double average(double* array, int count) {
  double sum = 0.0;                           // Accumulate total in here
  for(int i = 0 ; i < count ; i++)
    sum += *array++;                          // Sum array elements
  return sum/count;                           // Return average
}