在C中的同一循环中读取具有相同行数的多个文件

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,"nRegi?o %d",region);
     fprintf(stderr,"nClasse %d",class);
     fprintf(stderr,"nPredi??o %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,id_region)!=NULL))
    {
      //formating the input
      temp1=fscanf(line,&prediction_class);
      temp2=fscanf(line2,&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,class;
  contador=0;

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


  sscanf (line,&prediction_class);
  sscanf (line2,&region);
  fprintf(stderr,region);
  fprintf(stderr,prediction_class);



 }


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

    return(0);


}