c - 我如何按 block 读取c中的图像文件？

Question

我想用c读取图像，但在有限字节中这意味着读取n个字节直到结束所有图像

FILE *stream ;

FILE *stream1;

stream= fopen(pFile, "rb");

//when stream still bytes in stream

do

{

 numread = fread( stream1, sizeof( char ), 64, stream );

//treat the stream1 

}

Answer 1

你基本上需要这个:

FILE *stream1;

stream1 = fopen(pFile, "rb");

if (stream1 == NULL)
{
  printf("Failed to open file");
  return 1;
}

int numread;

do
{
  char buffer[64];
  numread = fread(buffer, sizeof(char), 64, stream1);

  // now buffer contains the 'numbytes' bytes you have read

} while (!feof(stream1)):