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  1. #include<stdio.h> #include<stdlib.h> int main( int argc, char**argv ){ char buf[256]; sprintf(buf, "cat %s %s | sort", argv[1], argv[2]); return system(buf); } $ $ gcc -o mer mer.c $ ./mer a.txt b.txt 1 2 2 1 3 5 1 5 3 2 4 4 3 3 5 3 4 4 3 5 3 3 5 5 3 5 5 4 2 2 4 5 2 4 5 2 $

  2. ...何併4個class B 就是要用第二個255來結合嗎? class B is /16. Merging 4x /16 subnet will have a subnet of 16-log(4) = /14. So, yes, /14 is on...