file read/wirte

#include <stdio.h> //标准输入输入出的头文件,printf和scanf都在这里了
#include <stdlib.h> //标准库头文件，内存分配、数学运算等都在这里了

#define MAXLEN 1024
int main(int argc, char *argv[])
{
if( argc < 3 )
{
printf("usage: %s %s/n", argv[0], "infile outfile");
exit(1);
}
FILE * outfile, *infile;
outfile = fopen(argv[2], "wb" );
infile = fopen(argv[1], "rb");
unsigned char buf[MAXLEN];
if( outfile == NULL || infile == NULL )
{
printf("%s, %s",argv[1],"not exit/n");
exit(1);
}
int rc;
while( (rc = fread(buf,sizeof(unsigned char),MAXLEN,infile)) != 0 )
{
fwrite( buf, sizeof( unsigned char ), rc, outfile );
}
fclose(infile);
fclose(outfile);

return 0;
}