第一天学求解！！！

12的二进制                  13的二进制                  14的二进制
1100                        1101                         1110
传送内容..........
0                           1                            0
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0                           0                            1
-----------              ----------------------      ---------------------------
1                           1                            1
-----------              ----------------------      ---------------------------
1                           1                            1
-----------             -----------------------      ---------------------------
0                           0                            0
-----------             -----------------------      ---------------------------
0                           0                            0
-----------            ------------------------      ---------------------------
0                           0                            0
-----------          --------------------------      ---------------------------
0                           0                            0
-----------         ---------------------------      ---------------------------
0                           0                            0
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0                           0                            0
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超出了CPU的能力范围，CPU就无法找到数据