[-64]原=101000000
[-64]反=110111111
[-64]補=111000000
[-50]原=100110010
[-50]反=111001101
[-50]補=111001110
(-64)-(50)=(-64)+(-50)
[-64]補=111000000
[-50]補=111001110 (+
[ X ]補=110001110 ---- 做補碼加法運算時進位丟棄,不影響計算結果(此為正常運算,非溢出)
[ X ]反=110001101
[ X ]原=101110010
即X=-114