if (year==q.year)//如果年相同 {
if (month==q.month)//若月相同 {
differece = q.day-day; }
else//月不同 {
if (month>q.month)//让pSmall指针指向小日期，pBig指针指向大日期 {
pSmall = &q; pBig = this; } else {
pSmall = this; pBig = &q; }
temp.month=pSmall->month; temp.day=pSmall->day;
for (i=1;i<=366;i++)//每次加一天，看看加多少次，两个日期相同，加的次数即为相差的天数 {//由于年份相同，相差的天数必然不会大于366，实际循环次数不大于366 temp.add(1);
if (temp.month==pBig->month && temp.day==pBig->day) {
differece=i; break; } }
differece=(month>q.month?-differece:differece); } }
else//年份不同 {
if (year>q.year)//让pSmall指针指向小日期，pBig指针指向大日期 {
pSmall = &q; pBig = this; } else {
pSmall = this; pBig = &q; }
temp.year=pSmall->year; temp.month=pSmall->month; temp.day=pSmall->day;
m=pBig->year-pSmall->year;
for (i=(m-1)*365;i<=(m+1)*366;i++)//每次加一天，看看加多少次，两个日期相同，加的次数即为相差的天数
{//计算出年份差m后，两个日期的天数差必定在[(m-1)*365,(m+1)*366]范围内，实际循环的次数不大于2*366
temp.add(1);
if (temp.month==pBig->month && temp.day==pBig->day) {
differece=i-(m-1)*365+1; break; }
}
differece=(year>q.year?-differece:differece); }
return differece; }
void Date::display() {
printf(\}
//主函数演示 void main() {
Date d(2013,5,21); printf(\原日期t1:\ d.display(); d.add(73);
printf(\ d.display(); d.del(73);
printf(\ d.display();
printf(\与2014-5-21日相差%d天\\n\}
10、设计一个点类Point，再设计一个矩形类，矩形类使用Point类的两个坐标点作为矩形的对角顶点。并可以输出4个坐标值和面积。使用测试程序验证程序。
class CPoint {
public: CPoint(){ iX = 0; iY = 0; } CPoint(int a,int b){ iX = a; iY = b; } void setXY(int a, int b){ iX = a; iY = b; } int getX(){ return iX; } int getY(){ return iY; } ~CPoint(){} private: int iX, iY; };
Class CRect {
public: CRect(){} ~CRect(){} CRect::CRect(CPoint one, CPoint two) { Point1 = one; Point4 = two; init(); } CRect::CRect(int iX, int iY, int iX2, int iY2) { Point1.setXY(iX, iY); Point4.setXY(iX2, iY2); init(); } Int RectArea();
Void init(); void disPlay(); private: CPoint Point1, Point2, Point3, Point4; };
void CRect::init() { Point2.setXY(Point4.getX(), Point1.getY()); Point3.setXY(Point1.getX(), Point4.getY()); }
int CRect::RectArea() { In t width, height, area; width = Point2.getX() - Point1.getX(); height = Point1.getY() - Point3.getY(); area = width*height; if (area>0) return area; else return -area; }
void CRect::disPlay() { cout << \ << Point1.getX() << \ << Point1.getY() << endl; cout << \ << Point2.getX() << \ << Point2.getY() << endl; cout << \ << Point3.getX() << \ << Point3.getY() << endl; cout << \ << Point4.getX() << \ << Point4.getY() << endl; }
Int main() { CPoint p1(-8, 5), p2(4, -10); CRect c1(p1, p2); CRect c2(1, 5, 5, 1); cout << \四个点的坐标：\ << endl; c1.disPlay(); cout << \的面积：\ << c1.RectArea() << endl; cout << \的面积：\ << c2.RectArea() << endl; system(\); return 0; }