C:打开的文件太多

Question

此代码打开一个目录，对于目录中的每个文件，它循环遍历文件中的每一行数据，然后对其进行解析以进行一些计算并将结果数据输出到一个新文件中。

问题是我最多只能输出大约 1021 个文件。输出所有数据后，我将关闭所有 fopens，所以我不确定我做错了什么。

fclose() 不应该关闭打开的文件，因此这不会发生吗？

int main(int argc, char *argv[])
{

 //sample data values
  double lat;
  double lon;  
  double convergence;   
  double pt_scale;        
  int    zone = 54;              
  double major_axis = 6378137.0000;        
  double flattening = (1/298.2572);        
  double zoneWidth = 6;         
  double centMeridian = -177;      
  double falseEast = FALSE_EASTING;         
  double falseNorth = FALSE_NORTHING;
  double scale = SCALE_FACTOR;  

  int max_size = 128;
  int current_size = max_size;
  char *pathStr = malloc(max_size);
  char *outPathStr = malloc(max_size);
  char coData[100]; //max length of line;
  long firstTerm, secondTerm; //terms we will split the line into, lat, lon, elevation.
  int counter = 0; //pos counter
  int d = EOF; //end of file ASCII
  char strIn[200];
  char* elevation;
  char strOut[200];
  char dirOut[200]; //sprintf must use a actual defined buffer otherwise there will be a buffer overflow.
  char* cchr;
  int j;
  _setmaxstdio(2048);
  printf("Please enter the path of the files: \n");
  getUserInput(pathStr, current_size, max_size); 
  printf("Please enter the output path of the files: \n");
  getUserInput(outPathStr, current_size, max_size);
  //loop through each file in the directory. Open the file, convert, then close it.
  //we will use dirent.h as it is cross platform so we wont have to worry about sharing issues
  DIR *dir; //new directory
  struct dirent *ent;
  dir = opendir(pathStr); //allcate it a path
  if(opendir(pathStr) == NULL)
  { printf("Error: %d (%s)\n", errno, strerror(errno));}
  int k;

  if(dir != NULL)
  {

         while((ent = readdir(dir)) != NULL) //loop through each file in the directory.
         {
                    //open the file and loop through each line converting it then outputing it into a new file
                if((!strcmp(ent->d_name,"..") || !strcmp(ent->d_name,".")) == 1)
                {
                        //dont want these directories
                        continue;
                }
                else
                {
                sprintf(strIn,"%s%s",pathStr,ent->d_name);    //get the file n
                FILE *fp = fopen(strIn, "r");
                if(fopen(strIn, "r") == NULL) //for inputting file
                { printf("Error: %d (%s)\n", errno, strerror(errno));
                                getchar();
                                  break; }

                sprintf(dirOut,"%s%d%s",outPathStr,counter,".geo");
                printf("%s \n",dirOut);
                FILE *fp2 = fopen(dirOut, "w"); //for outputting file
                if(fopen(dirOut, "w") == NULL)
                     { printf("Error: %d (%s)\n", errno, strerror(errno));
                      getchar();
                      break; }


                     while(fgets(coData, 100, fp) != NULL)//loop through line by line, allocate into 2 doubles and a string, pass the two coordinates and convert
                     {
                        //extract terms from coData                
                        char * pch; //pointer to array pos
                        char * pend;                          
                        pch = strtok(coData," ");                          
                        j = 0;

                            while(j <= 2) //We only want to split the first three parameters.
                            {
                                    //convert char array to double for co-oridinate conversion  

                                    if(j == 0)
                                    {
                                    firstTerm = atof(pch);         //latitude;           
                                    j++;
                                    continue;
                                    }
                                    if(j == 1)
                                    {
                                    pch = strtok(NULL, " ");
                                    secondTerm = atof(pch); //longitude
                                    j++;
                                    continue;
                                    }
                                    if(j == 2)
                                    {
                                    pch = strtok(NULL," ");
                                    elevation = pch; //elevation doesnt need to be converted because it isnt used in the coordinate conversion.
                                    break;
                                    }                                                               
                            }
                       grid2spheroid(&lat,&lon,&convergence,&pt_scale,firstTerm,secondTerm,zone,0, major_axis,flattening,zoneWidth,centMeridian,falseEast,falseNorth,scale);                                            
                       sprintf(strOut,"%f %f %s",lat,lon,elevation);
                       //printf("%d %d", lat, lon);                          
                       fputs(strOut,fp2);


                     }     //end of while        

                      fclose(fp2);
                      fclose(fp);
                      counter++;
                 }

                }
                closedir(dir);
  }
  free(pathStr); //finished using the path string so we can finish the 
  free(outPathStr);
  getchar(); 
  return 0;

 }

  void getUserInput(char *pathStr, int current_size, int max_size)
 {
 unsigned int i = 0;
 if(pathStr != NULL)
  {
              int c = EOF;

              //get the user input and reallocate the memory size if the input it too large.
              while((c = getchar()) != '\n' && c != EOF) //WHILE NOT END OF FILE OR NEW LINE (USER PRESSED ENTER)
              {
                   pathStr[i++] = (char)c;

                   if(i == current_size)
                   {
                        current_size = i+max_size;
                        pathStr = realloc(pathStr, current_size);
                   }    
              }
  }
}

Answer 1

您并没有关闭所有文件 ;-)

FILE *fp = fopen(strIn, "r");
if(fopen(strIn, "r") == NULL) //for inputting file

同样适用于您的输出。

我想你的意思更像是:

FILE *fp = fopen(strIn, "r");
if(fp == NULL) //for inputting file
{
     // error handling.