ex3.cpp

这里是我在学校时所写的一些程序

#include<iostream.h>
#include<String.h>

void main()
{
	const int MAXNUM=1000;
	char str[MAXNUM];
	char stack[MAXNUM/2];
	enum sta {s,f};
	enum sta k;
	k=s;
	cout<<"please input the string\n";
	cin>>str;
	int j=0,m=0,n=0;
	for(int i=0;i<(int)strlen(str)/2;i++)
		stack[i]=str[i];
	for(i=0;i<(int)strlen(str);i++)
	{
		if(str[i]!='a'&&str[i]!='b'||strlen(str)%2!=0)
		{
			cout<<"Unacceptable String!\n";
			return;
		}
		j=strlen(str)-1-i;
		switch(k)
		{
		case s:
			cout<<"(s,";
			for(m=i;m<(int)strlen(str);m++)
				cout<<str[m];
			cout<<",";
			n=i-1;
			if(n<(int)strlen(str)/2)
			{
				while(n>=0)
				{
					cout<<stack[n];
					n--;
				}
			}
			cout<<")-->\n";
			if(i+1==(int)strlen(str)/2){
			cout<<"(s,";
			for(m=i+1;m<(int)strlen(str);m++)
				cout<<str[m];
			cout<<",";
			n=i;
			if(n<(int)strlen(str)/2)
			{
				while(n>=0)
				{
					cout<<stack[n];
					n--;
				}
			}
			cout<<")-->\n";
			}
			if(i+1>=(int)strlen(str)/2)
				k=f;
			break;
		case f:
			if(str[i]!=str[j])
			{
				cout<<"Unacceptable String!\n";
				return;
			}
			cout<<"(f,";
			for(m=i;m<(int)strlen(str);m++)
				cout<<str[m];
			cout<<",";
			n=strlen(str)-1-i;
			if(i>=(int)strlen(str)/2)
			{
				while(n>=0)
				{
					cout<<stack[n];
					n--;
				}
			}
			cout<<")-->\n";
			break;
		default:
			break;
		}
	}
	cout<<"(f,e,e)\nAcceptable String!\n";
}