c++学习（三）

//介绍了内联函数、引用、以及带有参数值的函数的使用例子
/*#include"pch.h"
#include<iostream>
using namespace std;
#define MAXSIZE 100
#define ElemType int

//typedef int ElemType;
typedef struct
{
    ElemType *elem;
    int length;
}SqList;
Status InitList(SqList )
int main()
{
    return 0;
}*/
/*#include"pch.h"
#include<iostream>
using namespace std;
void swap(int &a, int &b)
{
    int t = a;
    a = b;
    b = t;
}
int main()
{
    int x;
    int y;
    cout << "please input your number that you want to swap:" << endl;
    cin >> x >> y;
    cout << "x=" << x << "y=" << y << endl;
    swap(x, y);
    cout << "x=" << x << "y=" << y;
    return 0;
}*/
/*#include"pch.h"
#include<iostream>
using namespace std;
const double PI = 3.14159265358979;
inline  double calArea(double radius) {
    return PI * radius*radius;
}
int main() {
    double r = 3.0;
    double area = calArea(r);
    cout << area << endl;
    return 0;
}*/
#include"pch.h"
#include<iomanip>
#include<iostream>
using namespace std;
int getVolume(int length, int width = 2, int height = 3);
int main() {
    int x, y, z;
    cout << "please input x,y,z" << endl;
    cin >> x >> y >> z;
    cout << "some body is:" << endl;

    cout << getVolume(x, y, z) << endl;
    cout << "some body data is:" << endl;
    cout << getVolume(x, y) << endl;
    cout << "some body data is:" << endl;
    cout << getVolume(x) << endl;
    return 0;
}
int getVolume(int length, int width, int height)
{
    cout << setw(5) << length << setw(5) << width << setw(5) << height << '\t';
    return length * width*height;
}