carmSqrt 方法开发浮点数对比系统自带 三种对比精度 39 int main(){ 40 float in = 237.0f; 41 42 float out1 = CarmSqrt(500.0*500.0); 43 float out2 = invSqrt(500.0*500.0); 44 float out3 = sqrt(500.0*500.0); 45 46 std::cout &l