CentOS下Jsoncpp安装配置的方法
时间:2022-10-13 14:15:59|栏目:C代码|点击: 次
1. 安装
执行命令
[root@VM-0-9-centos ~]# cd /home [root@VM-0-9-centos home]# mkdir jsoncpp [root@VM-0-9-centos home]# cd jsoncpp/ [root@VM-0-9-centos jsoncpp]# wget https://github.com/open-source-parsers/jsoncpp/archive/1.9.4.zip [root@VM-0-9-centos jsoncpp]# unzip 1.9.4.zip [root@VM-0-9-centos jsoncpp]# cd jsoncpp-1.9.4/ [root@VM-0-9-centos jsoncpp-1.9.4]# cmake . [root@VM-0-9-centos jsoncpp-1.9.4]# make [root@VM-0-9-centos jsoncpp-1.9.4]# make install
2. 测试
创建测试文件夹和两个文件
[root@VM-0-9-centos jsoncpp-1.9.4]# mkdir xltest [root@VM-0-9-centos jsoncpp-1.9.4]# cd xltest [root@VM-0-9-centos xltest]# vim jsontest.json [root@VM-0-9-centos xltest]# vim jsontest.cpp
其中jsontest.json 如下
[{"name":"Long", "age":6}]
jsontest.cpp 如下
#include <fstream> #include <iostream> #include <json/json.h> #include <cassert> #include <errno.h> #include <string.h> using namespace std; int main(void) { ifstream ifs; ifs.open("jsontest.json"); assert(ifs.is_open()); Json::Reader reader; Json::Value root; if (!reader.parse(ifs, root, false)) { cout << "reader parse error: " << strerror(errno) << endl; return -1; } string name; int age; int size; size = root.size(); cout << "total " << size << " elements" << endl; for (int i = 0; i < size; ++i) { name = root[i]["name"].asString(); age = root[i]["age"].asInt(); cout << "name: " << name << ", age: " << age << endl; } return 0; }
编译
[root@VM-0-9-centos xltest]# g++ jsontest2.cpp
执行可执行文件看到如下,安装成功
[root@VM-0-9-centos xltest]# ./a.out total 1 elements name: long, age: 6.
执行可执行文件看到如下,安装成功
3. 问题及解决
问题如下,
[root@VM-0-9-centos xltest]# ./a.out
/a.out: error while loading shared libraries: libjsoncpp.so.24: cannot open shared object file: No such file or directory
**解决办法**
执行一下 ldconfig 就行了
[root@VM-0-9-centos xltest]# ldconfig
若出现如下提示可直接忽略,不是错误。
ldconfig: /usr/local/lib64/libstdc++.so.6.0.28-gdb.py is not an ELF file - it has the wrong magic bytes at the start.