目录
new运算符
new运算符会在堆上申请一段内存空间,一般的变量是在栈上的。
new出来的变量只要不delete释放,在其他函数等任意位置都可以使用,
new会返回这段内存空间的首地址。
new并不确保会自动初始化
测试
- 这里我们使用vs2019运行测试
- 待测试的一共有4种变量申请方法:
- 全局区new - 图中global_new_int
- 全局区声明 - 图中global_int
- 函数内new - 图中fun_new_int
- 函数内声明 - 图中fun_int
- 直接运行是过不了vs2019的编译的
- 提示fun_int没有进行初始化就被使用
- 因此 函数内声明的变量 就显然是需要自己手动初始化的,编译器不会帮我们。
- 接下来给fun_int手动初始化,改为int fun_int = 123;
- 运行结果
- 全局区new - 不会自动初始化
- 全局区声明 - 会自动初始化为0
- 函数内new - 不会自动初始化
- 函数内声明 - 不会自动初始化,而且不手动初始化的话连编译都过不了
结论
- 可见new的不管是在全局区还是函数内都不会自动初始化。
- 而在全局区直接定义变量是会自动初始化的。
- 自己习惯手动初始化才是最保险的。
http://lisinopril.network/# zestril 5 mg tablets
cipro online no prescription in the usa: buy cipro online without prescription – purchase cipro
buy cytotec cytotec buy online usa buy cytotec over the counter
http://lisinopril.network/# price of zestril 30 mg
over the counter lisinopril: buy cheap lisinopril 40mg – prinivil 5 mg
http://finasteride.store/# cost propecia without a prescription
http://lisinopril.network/# lisinopril 25 mg cost
buy cytotec over the counter buy cytotec in usa buy cytotec in usa
cipro: buy ciprofloxacin – where can i buy cipro online
tamoxifen lawsuit tamoxifen depression tamoxifen cost
cost cheap propecia pill: generic propecia without prescription – buying cheap propecia without insurance
tamoxifen rash pictures tamoxifen cancer nolvadex gynecomastia
https://cytotec.club/# Misoprostol 200 mg buy online
tamoxifen and grapefruit: tamoxifen moa – tamoxifen rash pictures
http://cytotec.club/# cytotec online
cipro pharmacy buy cipro online without prescription purchase cipro
https://ciprofloxacin.tech/# ciprofloxacin generic price
propecia no prescription: buying cheap propecia price – propecia without dr prescription
lisinopril 10 lisinopril 4214 cost for 20 mg lisinopril
http://ciprofloxacin.tech/# buy cipro online without prescription
https://lisinopril.network/# lisinopril medication generic
cipro for sale buy ciprofloxacin over the counter buy cipro online
http://finasteride.store/# cheap propecia tablets
buy cheap propecia buy generic propecia without insurance generic propecia no prescription
does tamoxifen cause joint pain: tamoxifen brand name – nolvadex vs clomid
canadian pharmacy world Prescription Drugs from Canada canadian neighbor pharmacy
http://canadaph24.pro/# canadian neighbor pharmacy
https://indiaph24.store/# online pharmacy india
india online pharmacy http://indiaph24.store/# india pharmacy mail order
top 10 online pharmacy in india
mexican online pharmacies prescription drugs: Online Pharmacies in Mexico – buying from online mexican pharmacy
buying prescription drugs in mexico: Mexican Pharmacy Online – buying from online mexican pharmacy
medicine in mexico pharmacies Online Pharmacies in Mexico п»їbest mexican online pharmacies
https://canadaph24.pro/# canadian pharmacy phone number
best online pharmacies in mexico mexico pharmacy п»їbest mexican online pharmacies
https://indiaph24.store/# reputable indian pharmacies
online pharmacy india india online pharmacy india online pharmacy
mexican border pharmacies shipping to usa: Online Pharmacies in Mexico – mexico drug stores pharmacies
http://canadaph24.pro/# canada pharmacy
http://mexicoph24.life/# reputable mexican pharmacies online
indian pharmacy online Cheapest online pharmacy top 10 online pharmacy in india
https://indiaph24.store/# india online pharmacy
indian pharmacy Cheapest online pharmacy pharmacy website india
http://canadaph24.pro/# canadian pharmacy victoza
mexico drug stores pharmacies mexico pharmacy п»їbest mexican online pharmacies
http://indiaph24.store/# india pharmacy
http://mexicoph24.life/# reputable mexican pharmacies online
п»їbest mexican online pharmacies mexican mail order pharmacies buying prescription drugs in mexico
mexican border pharmacies shipping to usa: Mexican Pharmacy Online – mexico pharmacies prescription drugs
https://mexicoph24.life/# mexican border pharmacies shipping to usa
http://indiaph24.store/# india pharmacy