C++ {}作用域 return

软件工程小施同学发布时间：2021-10-29 11:07:52 ，浏览量：0

return不仅跳出了作用域，是可以直接结束函数的

#include 
#include 

int main()
{
    int a = 1;
    
    {
        if(a == 1){
            std::cout


    
        
        
        
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	请求信息 : 2025-03-15 10:15:22 HTTP/2.0 GET : /home/article/detail/id/423715.html
运行时间 : 0.0412s ( Load:0.0102s Init:0.0010s Exec:0.0193s Template:0.0108s )
吞吐率 : 24.27req/s
内存开销 : 1,919.21 kb
查询信息 : 18 queries 0 writes 
文件加载 : 36
缓存信息 : 5 gets 0 writes 
配置加载 : 132
会话信息 : SESSION_ID=ol0shi6g3umv562kgvp5607eqh
    
    
        
    
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	[ app_init ] --START--
Run Behavior\BuildLiteBehavior [ RunTime:0.000009s ]
[ app_init ] --END-- [ RunTime:0.000040s ]
[ app_begin ] --START--
Run Behavior\ReadHtmlCacheBehavior [ RunTime:0.000372s ]
[ app_begin ] --END-- [ RunTime:0.000391s ]
[ view_parse ] --START--
[ template_filter ] --START--
Run Behavior\ContentReplaceBehavior [ RunTime:0.000077s ]
[ template_filter ] --END-- [ RunTime:0.000104s ]
Run Behavior\ParseTemplateBehavior [ RunTime:0.008410s ]
[ view_parse ] --END-- [ RunTime:0.008434s ]
[ view_filter ] --START--
Run Behavior\WriteHtmlCacheBehavior [ RunTime:0.000156s ]
[ view_filter ] --END-- [ RunTime:0.000169s ]
[ app_end ] --START--
    
    
        
    
	[2] session_save_path(): open_basedir restriction in effect. File(/var/lib/php/session) is not within the allowed path(s): (/www/wwwroot/www.chaojiit.com/:/tmp/) /www/wwwroot/www.chaojiit.com/ThinkPHP/Common/functions.php 第 1239 行.
[8192] Array and string offset access syntax with curly braces is deprecated /www/wwwroot/www.chaojiit.com/ThinkPHP/Library/Think/Cache/Driver/File.class.php 第 59 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 34 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 134 行.
[8] Trying to access array offset on value of type null /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 134 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 135 行.
[8] Trying to access array offset on value of type null /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 135 行.
[8] Undefined variable: pinglun_list /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 144 行.
[8] Undefined variable: top_list /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 179 行.
    
    
        
    
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SHOW COLUMNS FROM `menu` [ RunTime:0.0002s ]
SELECT * FROM `menu` WHERE `fid` = 0 AND `status` = 1  [ RunTime:0.0001s ]
SELECT * FROM `menu` WHERE `fid` = 1 AND `status` = 1  [ RunTime:0.0001s ]
SELECT * FROM `menu` WHERE `fid` = 2 AND `status` = 1  [ RunTime:0.0001s ]
SELECT * FROM `menu` WHERE `fid` = 3 AND `status` = 1  [ RunTime:0.0001s ]
SELECT * FROM `menu` WHERE `fid` = 4 AND `status` = 1  [ RunTime:0.0001s ]
SHOW COLUMNS FROM `article` [ RunTime:0.0002s ]
SELECT * FROM `article` WHERE `id` = 423715 LIMIT 1   [ RunTime:0.0001s ]
SHOW COLUMNS FROM `bloger` [ RunTime:0.0002s ]
SELECT * FROM `bloger` WHERE `id` = 743 LIMIT 1   [ RunTime:0.0001s ]
SELECT COUNT(*) AS tp_count FROM `article` WHERE `bloger_id` = 743 LIMIT 1   [ RunTime:0.0003s ]
SHOW COLUMNS FROM `article_content` [ RunTime:0.0002s ]
SELECT `content` FROM `article_content` WHERE `article_id` = 423715 LIMIT 1   [ RunTime:0.0001s ]
SHOW COLUMNS FROM `article_cate` [ RunTime:0.0002s ]
SELECT `name` FROM `article_cate` WHERE `id` = 115 LIMIT 1   [ RunTime:0.0001s ]
SELECT * FROM `article` WHERE `bloger_id` = 743 ORDER BY view_count desc LIMIT 0,10   [ RunTime:0.0055s ]
    
    
        
    
	    
    
    



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