A.static_cast B.dynamic_cast C.const_cast D.reinterpret_cast
A.if(n==10) B.if(10==n) C.if(n>10&&n<10) D.if(n>=10&&n<=10)
A.if(x==0.0)orif(x!=0.0) B.if(x>=0.0) C.if(x<=0.0) D.constfloatEPSINON=0.00001;if((x>=-EPSINON)&&(x<=EPSINON)