#include

#include

#include

#include

int main()

{

char c;

int in, out;

in= open("file.in", O_RDONLY);

out= open("file.out", O_WRONLY|O_CREAT, S_IRUSR|S_IWUSR);

while(read(in, &c, 1)==1)

write(out, &c, 1);

exit(0);

}

Rewrite the code above using standard C library function from stdio.h, for example using fread and fwrite. Add code for recording the execution time.