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cout保留两位小数输出 - C/C++ - 清泛网 - 专注C/C++及内核技术
cout保留两位小数输出cout_two_decimalC++ std::cout输出2位小数的代码: include <stdio h> include <iostream> include <iomanip> std::setprecision函数需要引入该头文件int main(){ double dval C++ std::cout输出2位小数的代码:
#include <stdio.h>
#include <iostr...
Undefined reference to symbol X509_free - C/C++ - 清泛网 - 专注C/C++及内核技术
Undefined reference to symbol X509_freeundefined-reference-to-symbol-x509-freeUndefined reference to symbol X509_free 编译错误的解决方法:链接库中增加 -lcrypto,而非 -lcrypt参考:https: stackoverflow com questions 33215936 undefined-reference-to-symbol-x509-freeUndefined refer...
【解决】eclipse新建项目报错:overlaps the location of another project:...
【解决】eclipse新建项目报错:overlaps the location of another project: 'xxx'eclipse-error-overlaps-the-location-of-another-projectEclipse新建项目时报错:overlaps the location of another project: & 39;xxx& 39;,确保workspace下没有重复的工程,但之前曾经添加并删...
编译错误 error: ISO C++ forbids declaration of ‘xxx’ with no type [-...
编译错误 error: ISO C++ forbids declaration of ‘xxx’ with no type [-fpermissive]error-iso-c-forbids-declaration-of-with-no-type比较可能的情况1:函数没有写返回类型,加上返回类型后编译成功。 ifndef ttTree_h define ttTree_hclass ttTree {public: ttTree(void); int ...
eclipse cdt 运行程序时添加依赖库路径 - C/C++ - 清泛网 - 专注C/C++及内核技术
eclipse cdt 运行程序时添加依赖库路径eclipse-cdt-ld-library-path我们知道Linux即使依赖库和可执行文件在同一目录下,如果不使用 LD_LIBRARY_PATH 指定库路径(即当前目录)的话,仍然会报加载不到依赖库的错误。那么Eclipse CDT也是类似,...
namespace “std” has no member “clamp” - C/C++ - 清泛网 - 专注C/C++及内核技术
namespace “std” has no member “clamp”namespace-std-has-no-member-clamperror: ‘clamp’ is not a member of ‘std’namespace std has no member clampC++17特性,加编译选项 -std=c++17error: ‘clamp’ is not a member of ‘std’
namespace “std” h...
【解决】munmap_chunk(): invalid pointer - C/C++ - 清泛网 - 专注C/C++及内核技术
【解决】munmap_chunk(): invalid pointermunmap_chunk-invalid-pointer原因:new malloc出来的指针被覆盖掉了,然后delete free就会报这个错误。例如:char* word = (char*)malloc(10);word = "abc"; 应使用 strcpy(word, "abc");free(word) 原因:new/malloc出来的指针被...
【解决】C、C++混合编译link失败问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
【解决】C、C++混合编译link失败问题c_cpp_mixed_compileC、C++混合编译时,C头文件不加 extern "C",函数按照C++编译会改变函数名称,导致link时报undefined reference to `xxx` 的 错误。加 extern "C" 解决,但是直接加的话 C、C++混合编译时,C...
Intel SMID指令集编译错误: inlining failed in call to always_inline \'x...
Intel SMID指令集编译错误: inlining failed in call to always_inline 'xxx': target specific option mismatch xxxintel_smid_compile_error最近在使用CPU指令集优化代码的时候,编译出错,报错如下: usr lib64 gcc x86_64-suse-linux 7 include avx2intrin h:252:1: error: inlining ...
Linux ftp上传文件 实战篇 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
Linux ftp上传文件 实战篇$ftp passive ls put get等Linux命令完成ftp文件上传下载。连接FTP命令:
$ftp xx.xx.xx.xx
username
password
ftp> passive
(需要关闭passive模式,不然上传不了)
查看远程FTP服务器文件命令:
ftp> ls
若ls卡住...