用系統(tǒng)調(diào)用signal()讓父進(jìn)程捕捉鍵盤上來的中斷信號(hào)（按Ctrl-C鍵）；當(dāng)捕捉到中斷信號(hào)后，父進(jìn)程用系統(tǒng)調(diào)用kill()向兩個(gè)子進(jìn)程發(fā)出信號(hào)，子進(jìn)程捕捉到信號(hào)后分別輸出下列信息后終止： Child Process 1 is Killed by Parent! Child Process 2 is Killed by Parent! 父進(jìn)程等待兩個(gè)子進(jìn)程終止后，輸出如下的信息后終止： Parent Process is Killed!
