c++读取list.txt中每行的字符串以及写入二进制文件

 1 #include <fstream>
 2 string path = "";
 3 FILE* fp = fopen(path.c_str(), "r");
 4 while(!feof(fp)){
 5   char str[20];
 6   fgets(str, 20, fp);
 7   string str_s(str);  
 8   int eindx = str_s.find("XX.jpg");
 9   string filename = "XX" + str_s.substr(0, eindx) + ".jpg";
10   im = imread(filename, CV_LOAD_IMAGE_COLOR);
11   if(im.empty()){
12      fprintf(stderr, "imread %s failed\n", filename);
13      return -1;    
14 }

 FILE *fd = NULL;
 string tmp = lines_[lines_id_].first;
 int eindx = tmp.find("XX.png");
 string finenames = "XXX" + tmp.substr(38, eindx) + "y";
 if(fd){
     fwrite(dmap.data, sizeof(float), dmap.cols*dmap.rows, fd);
     fclose(fd);
 }else{
 LOG(INFO) << "CANNOT OPEN FILE " << "XXX" + tmp.substr(38, eindx) + ".y";
 }