bmp图像 蓝桥杯

#include<iostream>
#include<fstream>
using namespace std;
int width,height,start;//存放图像的宽度高度和起始位置
char bytePic[100][100];//将图像按字节存放到字符数组中
int bitPic[100][100];//将图像按位存放到数组中
int tag[100][100];//0表示未读取
int lianTong(int x,int y);//计算连通面积
int youYi(int m);
int main() {
 ifstream inFile("in.bmp",ios::binary);
 if(!inFile) {
  cout<<"打开失败"<<endl;
  exit(1);
 }
 inFile.seekg(10);
 inFile.read((char*)&start,4);
 cout<<"起始位置:"<<start<<endl;
 inFile.seekg(18);
 inFile.read((char*)&width,4);
 //确保行所占的字节数必须是4字节(32位）的倍数
 if(width % 32 != 0)
  width = (width / 32 + 1)*32;
 cout<<"宽度:"<<width<<endl;
 inFile.seekg(22);
 inFile.read((char*)&height,4);
 cout<<"高度："<<height<<endl;
    //将图像按字节读出
 inFile.seekg(start);
 for(int i=0;i<height;i++){
  for(int j=0;j<width/8;j++) {
   inFile.read((char*)&bytePic[i][j],1);
   //cout<<bytePic[i][j];
  }
  
 }
 inFile.close();
    //将图像按二进制存储
 /*cout<<"二进制图像(倒着):"<<endl;
    for(int m=0,q=0;m<height;m++){
  for(int n=0;n<width/8;n++) {
   for(int k=128;k>=1;k=k>>1) {//进行位操作将字节转换为位
                 if(bytePic[m][n]&k)
      bitPic[m][q++] = 1;
     else
      bitPic[m][q++] = 0;
     //cout<<bitPic[m][q-1];
   }
  }
  //cout<<endl;
 }*/
 for(int m=0;m<height;m++){
  for(int n=0;n<width;n++){
   for(int k=0;k<8;k++){
    if(bytePic[m][n] & youYi(k)){
     bitPic[m][n*8+7-k] = 1;
    }else{
     bitPic[m][n*8+7-k] = 0;
    }
   
   }
  }
 
 }
 for(int a=0;a<height;a++) {
  for(int b=0;b<width;b++) {
   cout<<bitPic[a][b];
  }
  cout<<endl;
 }

   
 //输出结果
 //cout<<tag[1][1]<<endl;
 for(int x=0;x<height;x++){
  for(int y=0;y<width;y++){
    if(tag[x][y] == 0 && bitPic[x][y] == 0){
     tag[x][y] = 1;
     cout<<lianTong(x,y)<<endl;
    }else{
    tag[x][y] = 1;
    }
      
  }
 }
 return 0;
}

int youYi(int m){
 int a=1;
 for(int i=0;i<m;i++){
   a=a*2;}
 return a;
}

int lianTong(int x,int y ) {
 int sum=1;
 //上
 if(x > 0 && tag[x-1][y] == 0 && bitPic[x-1][y]==0) {
  tag[x-1][y]=1;
  sum = sum + lianTong(x-1,y);
 } else {
  tag[x-1][y] = 1;
 }
 //下
 if(x < height && tag[x+1][y] == 0 && bitPic[x+1][y] == 0) {
  tag[x+1][y] = 1;
  sum = sum + lianTong(x+1,y);
 }else {
  tag[x+1][y] = 1;
 }
 //左
 if(y >0 && tag[x][y-1] == 0 && bitPic[x][y-1] == 0) {
  tag[x][y-1] = 1;
  sum = sum + lianTong(x,y-1);
 }else {
  tag[x][y-1] = 1;
 }
 //右
 if(y < width && tag[x][y+1] == 0 && bitPic[x][y+1] == 0) {
  tag[x][y+1] = 1;
  sum = sum + lianTong(x,y+1);
 }else {
  tag[x][y+1] = 1;
 }
 //左上
 if(x > 0 && y > 0 && tag[x-1][y-1] == 0 && bitPic[x-1][y-1] == 0) {
  tag[x-1][y-1] = 1;
  sum = sum + lianTong(x-1,y-1);
 }else {
  tag[x-1][y-1] = 1;
 }
 //右上
 if(x > 0 && y < width && tag[x-1][y+1] == 0 && bitPic[x-1][y+1] == 0) {
  tag[x-1][y+1] = 1;
  sum = sum + lianTong(x-1,y+1);
 }else {
  tag[x-1][y+1] = 1;
 }
 //左下
 if(x < height && y > 0 && tag[x+1][y-1] == 0 && bitPic[x+1][y-1] == 0) {
  tag[x+1][y-1] = 1;
  sum = sum + lianTong(x+1,y-1);
 }else {
  tag[x+1][y-1] = 1;
 }
 //右下
 if(x < height && y < width && tag[x+1][y+1] == 0 && bitPic[x+1][y+1] == 0) {
  tag[x+1][y+1] = 1;
  sum = sum + lianTong(x+1,y+1);
 }else {
  tag[x+1][y+1] = 1;
 }
 return sum;
 
}