程序设计基础实验报告(5)

i--; } cout<<"Sort correctlly!\n"; }

int cmp(const void *m,const void *n) { return *(int *)m-*(int *)n; }

测试数据（输入、输出）：

第2_4题

算法描述：

编写程序XMLtoTXT自动将XML文件email.xml转换为文本文件email.txt。命令行格式：XMLtoTXT email.xml email.txt。 源程序： No2_4.cpp

#include<iostream.h> #include<fstream.h> #include<string.h> #include<stdlib.h> void main() { fstream infile,outfile; infile.open("email.xml",ios::in); if(!infile) { cout<<"email.xml can't open.\n"; abort(); } outfile.open("email.txt",ios::out); if(!outfile) { cout<<"email.txt can't open.\n"; abort(); } char ch=0; int state=0; cout<<"Progressing......"<<endl; while((ch=infile.get())!=EOF) { char str[10]={0}; if(ch=='<') { for(int i(0);infile.peek()!='>';i++) { str[i]=infile.get(); } if(!strcmp(str,"from")) state=-1; if(state==-1&&!strcmp(str,"address")) state=1; if(!strcmp(str,"to")) state=-2; if(state==-2&&!strcmp(str,"address")) state=2; if(!strcmp(str,"subject")) state=3; if(!strcmp(str,"body")) state=4; if(state>0) { switch(state) { case 1:outfile<<"from:";break;