c++学习例子 picture图片

// Picture.cpp: implementation of the Picture class. // ////////////////////////////////////////////////////////////////////// #include "stdafx.h" #include "Picture.h" ////////////////////////////////////////////////////////////////////// // Construction/Destruction ////////////////////////////////////////////////////////////////////// ostream operator<<(ostream& o,Picture& p) { p.Display(o); return o; } Picture operator+(Picture& p1,Picture& p2) { Picture p(p1); p.RightAdd(p2); return p; } ////////////////////////////////////////////////////////////////////////// Picture::Picture():m_width(0),m_height(0),m_pdata(NULL)//默认构造函数 { } Picture::Picture(const char*const*const arr ,int len) { int maxlen=0; for (int i=0;i<len;i++) { maxlen = Picture::max(maxlen,strlen(arr[i])); } m_width = maxlen;//字符串长度，不包括 '\0' m_height = len; m_pdata = new char[m_width*m_height]; memset(m_pdata,0,m_width*m_height); for (i=0;i<m_height;i++) { for (int j=0;arr[i][j]!='\0';j++) { m_pdata[i*m_width+j]=arr[i][j]; } } } Picture::~Picture() { delete m_pdata; } Picture::Picture(const Picture& p) { m_width = p.m_width; m_height= p.m_height; m_pdata = new char[m_width*m_height]; memcpy(m_pdata,p.m_pdata,m_width*m_height); } Picture& Picture::operator =(const Picture& p) { if (this==&p)//自我赋值 {return *this; } delete m_pdata; this->Picture::Picture(p);//把复制构造函数当普通函数使用 return *this; } ////////////////////////////////////////////////////////////////////////// void Picture::Display(ostream& o) { for (int i=0;i<m_height;i++) { for (int j=0;j<m_width;j++) { o<<position(i,j); } o<<endl; } } ////////////////////////////////////////////////////////////////////////// Picture& Picture::ShowFrame(char jiao/* = */,char topbottom/* = */,char leftright/* = */) { m_jiao = jiao; m_topbottom = topbottom; m_leftright = leftright; return frame(); } Picture& Picture::frame() { int w = m_width + 2; int h = m_height + 2; char* pdata=new char[w*h]; memset(pdata,0,w*h); for (int i=0;i<m_height;i++) { for (int j=0;j<m_width;j++) { pdata[(i+1)*w+j+1]=position(i,j); } } delete m_pdata; m_pdata = pdata; m_width = w; m_height = h; kuang(0,0,w,h); return *this; } Picture& Picture::LeftAdd(const Picture& p) { int w = m_width + p.m_width; int h = Picture::max(m_height,p.m_height); char* pdata = new char[w*h]; memset(pdata,0,w*h); for (int i=0;i<m_height;i++) { for (int j=0;j<m_width;j++) { pdata[i*w+j+p.m_width] = position(i,j); } } for (i=0;i<p.m_height;i++) { for (int j=0;j<p.m_width;j++) { pdata[i*w+j]=p.position(i,j); } } m_width = w; m_height =h; delete m_pdata; m_pdata = pdata; return *this; } Picture& Picture::RightAdd(const Picture& p) { int w = m_width + p.m_width; int h = Picture::max(m_height,p.m_height); char* pdata = new char[w*h]; memset(pdata,0,w*h); for (int i=0;i<m_height;i++) { for (int j=0;j<m_width;j++) { pdata[i*w+j] = position(i,j); } } for (i=0;i<p.m_height;i++) { for (int j=0;j<p.m_width;j++) { pdata[i*w+j+m_width]=p.position(i,j); } } m_width = w; m_height =h; delete m_pdata; m_pdata = pdata; return *this; } Picture& Picture::TopAdd(const Picture& p) { int w = Picture::max(m_width,p.m_width); int h = m_height + p.m_height; char* pdata = new char[w*h]; memset(pdata,0,w*h); for (int i=0;i<m_height;i++) { for (int j=0;j<m_width;j++) { pdata[(i+p.m_height)*w+j] = position(i,j); } } for (i=0;i<p.m_height;i++) { for (int j=0;j<p.m_width;j++) { pdata[i*w+j] = p.position(i,j); } } m_height = h; m_width = w; delete m_pdata; m_pdata = pdata; return *this; } Picture& Picture::BottomAdd(const Picture& p) { int w = Picture::max(m_width,p.m_width); int h = m_height + p.m_height; char* pdata = new char[w*h]; memset(pdata,0,w*h); for (int i=0;i<m_height;i++) { for (int j=0;j<m_width;j++) { pdata[i*w+j] = position(i,j); } } for (i=0;i<p.m_height;i++) { for (int j=0;j<p.m_width;j++) { pdata[(i+m_height)*w+j] = p.position(i,j); } } m_height = h; m_width = w; delete m_pdata; m_pdata = pdata; return *this; }