在C中的同一循环中读取具有相同行数的多个文件

Question

我有两个文件,都有47k行.我正在尝试同时读取每个文件的行.问题是只读取每个文件的第一行.那是我写的代码:

id_region = fopen(argv[3], "r");
prediction=fopen(argv[4], "r");

int prediction_class, class, region;

while ((fscanf(id_region,"%d  1:%d",&class,&region) == 2) && (fscanf(prediction,"%d",&prediction_class) == 1))
{

     fprintf(stderr,"\nRegião %d",region);
     fprintf(stderr,"\nClasse %d",class);
     fprintf(stderr,"\nPredição %d",prediction);
}

我的代码有什么问题？

编辑:我尝试了这段代码,但是当我运行它时我遇到了分段错误.这有什么不对？

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

    FILE* id_region;
    FILE* prediction;   

    id_region = fopen(argv[1], "r");
    prediction=fopen(argv[2], "r");

    char line[50];
    char line2[50];

    int prediction_class,region,temp1,temp2;

    while((fgets (line,10,prediction) != NULL) && (fgets (line2, 10, id_region)!=NULL))
    {
      //formating the input
      temp1=fscanf(line,"%d",&prediction_class);
      temp2=fscanf(line2,"%d",&region);

      fprintf(stderr,"\nRegion: %d",region);
      fprintf(stderr,"\nPrediction: %d",prediction_class);
    }

    fclose(prediction);
    fflush(prediction);
    fclose(id_region);
    fflush(id_region);   

    return(0);


 }

由此代码解决了!

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

  FILE* id_region;
  FILE* prediction; 

  id_region = fopen(argv[1], "r");
  prediction=fopen(argv[2], "r");

  char line[50];
  char line2[50];

  int prediction_class,region,class;
  contador=0;

  while((fgets(line,10,prediction)!= NULL) && (fgets(line2, 20, id_region)!=NULL))
 {


  sscanf (line,"%d", &prediction_class);
  sscanf (line2,"%d  1:%d",&class,&region);
  fprintf(stderr,"\nRegion: %d",region);
  fprintf(stderr,"\nPrediction: %d",prediction_class);



 }


   fclose(prediction);
   fflush(prediction);
   fclose(id_region);
   fflush(id_region);   

    return(0);


}

Answer 1

fscanf()您应该使用fgets()获取每一行,而不是使用来获取行的sscanf()格式化输入.

对于编辑过的问题,我发现至少有两个问题:你还在使用fscanf(),而它应该是sscanf().并且fflush() 在关闭流后使用fclose().实际上fclose()会导致流冲洗,您不需要手动冲洗它们.