我试图简单地将浮点值数组写入文件,然后将其读回。
我曾尝试直接从数组中写入它,但是当读回它时,我遇到了长度大于153的数组的问题。为了清楚起见,该代码示例逐个写入每个浮点值。

对于索引大于或等于153的值,它们的值为153.0,其中应为153.0、154.0、155.0,...

为什么这段代码对我不起作用?

  int length = 160;

  char* fileName = "testFile.dat";

  // Write data to file

  FILE* file = fopen (fileName, "w");

  for(int i = 0; i< length; i++){
    // We are just storing the indices, so value at i is equal to i
    float f = (float) i;
    fwrite(&f, sizeof(float), 1, file);
  }

  fclose(file);

  // Read data from file into results array

  file = fopen(fileName, "r");

  float* results = new float[length];

  for(int i = 0; i< length; i++){
    float f;
    fread(&f, sizeof(float), 1, file);
    results[i] = f;
  }

  fclose(file);

  // Now check data in results array

  bool fail = false;

  for(int i = 0; i< length; i++){
    if(results[i]!=(float)i){
      fail = true; // This should not be hit, but it is!
    }
  }

  delete [] results;

谢谢,
戴夫

最佳答案

FILE* file = fopen (fileName, "wb");
FILE* file = fopen (fileName, "rb");

10-07 16:08
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