bin_file_copy_test.cpp

本程序介绍了如何用C语言快速读写磁盘文件。

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

void bin_file_copy_test()  
{
	FILE *fp_in,*fp_out;
	unsigned char ch;

	if( (fp_in = fopen( "E:\\C++_sample\\File_operating\\bin_file_test.m4v", "rb" )) == NULL )
	{
		printf("cannot open the file bin_file_test.m4v\n");
		exit(0);
	}

	if( (fp_out = fopen( "E:\\C++_sample\\File_operating\\copy_bin_file.m4v", "wb" )) == NULL )
	{
		printf("cannot open the outfile\n");
		exit(0);
	}

	while(1)  
	{
		ch = fgetc(fp_in);
		if( feof(fp_in) )   //feof function returns "non_zero" when fp overflows in file,that is,
			break;          //if fp is located in the end of file and fp moves to next element 
		fputc( ch, fp_out );//again,then fp overflows.
	}

	fclose(fp_in);
	fclose(fp_out);

	return;
}