error C2668: 'abs' : ambiguous call to overloaded function - 家家的專欄 - 博客頻道 - CSDN.NET
C:/Program Files/Microsoft Visual Studio 8/VC/include/math.h(539): could be 'long double abs(long double)'1> C:/Program Files/Microsoft Visual Studio 8/VC/include/math.h(491): or 'float abs(float)'1> C:/Program Files/Microso...