#include?<stdio.h>
int?main()?{
FILE?*input1?=?fopen("test1",?"rb");
if?(!input1)?{
printf("file?\"test1\"?open?failed!\n");
return?-1;
}
FILE?*input2?=?fopen("test2",?"rb");
if?(!input2)?{
printf("file?\"test2\"?open?failed!\n");
return?-1;
}
FILE?*output?=?fopen("test",?"wb");
if?(!output)?{
printf("file?\"test\"?open?failed!\n");
return?-1;
}
unsigned?char?buffer[8192];
long?bytes?=?0;
do?{
bytes?=?fread(buffer,?1,?sizeof(buffer),?input1);
if?(bytes)?{
fwrite(buffer,?1,?bytes,?output);
}
}?while?(bytes?==?sizeof(buffer));
fclose(input1);
do?{
bytes?=?fread(buffer,?1,?sizeof(buffer),?input2);
if?(bytes)?{
fwrite(buffer,?1,?bytes,?output);
}
}?while?(bytes?==?sizeof(buffer));
fclose(input2);
fclose(output);
printf("done.\n");
return?0;
}