C/C++ parsing XML format files

Earlier we talked about generating XML files, but how to parse XML files?

File to be parsed:

Code Demo

#include <iostream>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <mxml.h>

using namespace std;
static int Debug = 1;

int main(int argc, const char* argv[])
{
	if(argc != 2){
		fprintf(stderr, "./a.out dest_name\n");
		exit(-1);
	}

	FILE* rfp;
	int count = 0;
	while(!(rfp = fopen(argv[1], "r")) && count < 5){
		fprintf(stderr, "file open error %d\n", ++count);
	}

	if(count == 5){
		exit(-2);
	}
	if(Debug) printf("file:%s, rfp:%p, count:%d\n", argv[1], rfp, count);


	mxml_node_t* root = NULL;
	mxml_node_t* people = NULL;
	mxml_node_t* object = NULL;
	mxml_node_t* name = NULL;
	mxml_node_t* age = NULL;
	mxml_node_t* sex = NULL;

	people = mxmlLoadFile(NULL, rfp, MXML_NO_CALLBACK);  // 根标签
	object = mxmlFindElement(people, people, "object", NULL, NULL, MXML_DESCEND);
	while(object){

		name = mxmlWalkNext(object, root, MXML_DESCEND_FIRST);
		printf("attr:%s, name:%s\n", mxmlElementGetAttr(name, "report"),
				 mxmlGetText(name, 0));

		age = mxmlWalkNext(name, root, MXML_NO_DESCEND);
		printf("attr:%s, age:%s\n", mxmlElementGetAttr(age, "year"),
				 mxmlGetText(age, 0));

		sex = mxmlWalkNext(age, root, MXML_NO_DESCEND);
		printf("age:%s\n", mxmlGetText(sex, 0));

		object = mxmlFindElement(object, people, "object", NULL, NULL, MXML_NO_DESCEND);
	}


	return 0;
}

The effect is as follows:

Later, I will introduce to you the json format file and the generation and analysis of Json file by C/C++