C语言标准库深度解析：关键函数与诊断技巧

####<<&

####<<&

###F&

　　、函数

　　3#6"#E"$"%&

　　函数 " 将一个 3#6" 类型的对象的数据成员设置成为按照当前地域环境

的有关规则进行数量格式化后的相应值。

　　#E$#)#E#%&

　　函数  用于更改和查询程序的整个当前地域环境或部分设置。地域环境变量由

6. <math.h>：数学函数

中标准数学函数的函数定义及功能简介，见下表。

3 #$3 #8%)#对数函数 $8%

3 #$3 #8%&#)#对数函数 

3 #7$3 #8)#3 #%&)#指数函数$8 的  次方%

3 #G$3 #8%&#)#计算平方根函数

3 #$3 #8%&#)#向上舍入函数

3 #H$3 #8%&)#向下舍入函数

3 # $3 #8%&)#求浮点数的绝对值

3 #8$3 #8)##%&#)#装载浮点数函数

3 #8$3 #8)#E#8%&#)#分解浮点数函数

3 #$3 #8)#3 E#%&#)#分解双精度数函数

3 #$3 #8%&#)#反正切函数 

3 #$3 #)#3 #8%&#)#反正切函数 

3 #$3 #8%&#)#计算 8 的双曲正弦值

3 #$3 #8%&#)#计算 8 的双曲余弦值

3 #$3 #8%&#)#计算 8 的双曲正切值

　　在标准库中，还有一些与数学计算有关的函数定义在其他头文件中。

eld is downwind, brooding House separate from the breeding shed, and ... Building chicken farms must also consider the construcon of chicken manure treatment facilies such as sepc tanks, methane-generang pit, do not let the chicken manure directly. Five to do a disease prevenon and control, do not cut corners. Built into the chicken in chicken farm, will be required to do a variety of vaccine injecons and disinfecon in chicken farm, do not hold the chance, and do scienc farming. Reasonable problems in building a chicken coop hen house layout, can provide a good environment for chicken, making its full producve potenal, so other than in understanding the physiological characteriscs of the chicken itself, and must be properly planned and constructed sheds. A chicken layout consideraons 1. Sites to choose away from populated areas, tra&c convenient, away from the road 2. Gaozao terrain, a lot of sunshine. Winter sun as possible, summer wind, and not a+er the rain water. Larger, leaving room for development 3. Abundant water resources polluon-free, easy to access, su&cient power is guaranteed 4. Building structure, the economy, saving money, and saving energy, it is facing in accordance with local environmental and physiological condion, lighng is good, easy to venlaon, easy to operate, so conducive to cooling in the summer, to insulaon in winter cold 5. Layout of premises should be reasonable, do disnguish

between