int
main(int argc, char *argv[])
{
FILE *fpin, *fpout;
int readsize,COPYSIZE=16384;
double st,en;
char c[16384];
if(argc != 3)
{
fprintf(stderr,"Usage: copy_highio<コピー元><コピー先>\n");
exit(EXIT_FAILURE);
}
/*コピー元ファイルを開く*/
if((fpin = fopen(argv[1],"rb")) == NULL)
{
perror(argv[1]);
exit(EXIT_FAILURE);
}
/*コピー先ファイルを開く*/
if((fpout = fopen(argv[2],"wb")) == NULL)
{
perror(argv[2]);
exit(EXIT_FAILURE);
}
st = getETime();
while((readsize = fread(c,sizeof(COPYSIZE),1,fpin)) >0)
{ /*256バイト読込む*/
fwrite(c,sizeof(readsize),1,fpout); /*256バイト書き込む*/
}
en = getETime();
fclose (fpin);
fclose (fpout);
printf("Elapsed Time: %.6f\n", en - st);
}
double checkOutETime( void )
{
double curETime = getETime();
return ( curETime - startETime );
}
void checkInETime( void )
{
startETime = getETime();
}