STL容器使用DEMO-valarray

Code:

//////////////////////////////////////////////////////////////////////////

// CopyRight(c) 2009, YOYO, All Rights Reserved.

// Author: LIN YiQian

// Created: 2009/08/24

// Describe: STL valarray 使用DEMO

//////////////////////////////////////////////////////////////////////////

#include <iostream>

#include <valarray>



using namespace std;



typedef valarray<double> DOUBLE_VAR;



const int VALARRAY_SIZE = 3;



void PrintArray(DOUBLE_VAR varDouble)

{

for (int i = 0; i < varDouble.size(); ++i)

{

cout << varDouble[i] << " ";

}

cout << endl;

}



void main(void)

{

DOUBLE_VAR varDouble(VALARRAY_SIZE);



// assign

for (int i = 1; i < 4; ++i)

{

varDouble[i-1] = i*i;

}



// size

{

cout << "ValArray size: " << varDouble.size() << endl;

}



// print array

{

cout << "ValArray: "; PrintArray(varDouble);

}



DOUBLE_VAR varIntSqrt(VALARRAY_SIZE);

varIntSqrt = sqrt(varDouble);



// print sqrt array

{

cout << "Sqrt ValArray: "; PrintArray(varIntSqrt);

}



DOUBLE_VAR varIntPow(VALARRAY_SIZE);

varIntPow = pow(varDouble, 2.0);



// print pow array

{

cout << "Pow ValArray: "; PrintArray(varIntPow);

}



// sum, max & min

{

cout << "Sum: " << varIntPow.sum() << endl;

cout << "Max: " << varIntPow.max() << endl;

cout << "Min: " << varIntPow.min() << endl;

}



system("pause");

}