log( 9000.00 ) = 9.104980 log10( 9000.00 ) = 3.954243 To generate logarithms for other bases, use the mathematical relation: log base b of a == natural log (a) / natural log (b). C++ Copy // logbase.cpp #incl
printf( "log10( %.2f ) = %f\n", x, y ); } Output code log( 9000.00 ) = 9.104980 log10( 9000.00 ) = 3.954243 To generate logarithms for other bases, use the mathematical relation: log base b of a == natural log (a) / natural log (b). code // logbase.cpp #include <math...
log( 9000.00 ) = 9.104980 log10( 9000.00 ) = 3.954243 To generate logarithms for other bases, use the mathematical relation: log base b of a == natural log (a) / natural log (b). C++ // logbase.cpp#include<math.h>#include<stdio.h>doublelogbase(doublea,doublebase){returnlog(a) ...
Thelog10()function returns the base 10 logarithm of a number. Tip:The base 10 logarithm indicates approximately how many digits the integer part of a number has. See how to use it to count digits in the example below. Thelog10()function is defined in the<cmath>header file. ...
The complex number that is the base 10 logarithm of the input complex number. Remarks The branch cuts are along the negative real axis. Example 复制 // complex_log10.cpp // compile with: /EHsc #include <vector> #include <complex> #include <iostream> int main() { using namespace std...
10) ///link file printf("l_name:%s/%s\n",basePath,ptr->d_name); else if(ptr->d_type == 4) ///dir { printf("d_name:%s/%s\n",basePath,ptr->d_name); printf("this is a dir\n"); continue; //是目录,继续递归读目录下面的 //memset(base,'\0',sizeof(base)); //strcpy...
10.支持日志压缩,压缩为zip或7z等文件,缩小体积,便于储存和通过网络传输。 日志的意义在于排查问题和运维。 若所有机器都把日志上传上去则失去了意义,且服务器也顶不住。而这种被动的触发,针对某个机器的上送是可行的且有价值的。并且还可以在应用中增加当应用出现客户没发现缺不该出现的问题时,主动触发上报异常日...
log( 9000.00 ) = 9.104980 log10( 9000.00 ) = 3.954243 To generate logarithms for other bases, use the mathematical relation: log base b of a == natural log (a) / natural log (b). // logbase.cpp #include <math.h> #include <stdio.h> double logbase(double a, double base) { retu...
log4cplus::SharedAppenderPtr pFileAppender(new log4cplus::FileAppender("log1.txt", std::ios_base::app, true, false)); log4cplus::SharedAppenderPtr pRollingFileAppender(new log4cplus::RollingFileAppender("rollog", 15, 3, true, false)); pAppender->setName("ConsoleAppender"); pFile...
WARN [STORAGE] init (ob_tmp_file.cpp:433) [52248][2400][xxxxx-xxxxx] [lt=10] [dc=0] invalid argument(ret=-4002, fd=414577, dir_id=-2102698303) 问题原因 在查询操作执行过程中,数据库会产生大量临时的数据,由于受到系统内存大小的限制,这些数据需要以文件形式临时存储到外部设备中。dir_id 由临...