1.分支语句误区 1.1连续判断符号 include<stdio.h>intmain(){intage=10;if(18<=age<28)printf("青年\n");return0;} 执行上面语句时，编译器给出如下warning： main.c:6:16:warning:resultofcomparisonofconstant28withbooleanexpressionisalwaystrue[-Wtautological-constant-out-of-range-compare]if(18<=age<28)^1warninggen...