正确(改进).cpp

自编汉诺塔,自己改进,很好用,很好理解.

#include <iostream>
#include <fstream>

using namespace std;

int main()
{
	ifstream inClintFile( "new information.txt", ios::in);
	//ifstream inClintFile( "new information1.txt", ios::in);

	if ( !inClintFile ){
	   cerr << "File could not be opend\n";
	   exit(1);
	}

	/*int count = 0;
    char ch;
	while (inClintFile >> ch )
	{
		if ( ch == '@' )
			count++;      
	}

	cout << "Email" << count;*/
	//char email[137228];
    ofstream outClintFile( "email.txt", ios::ate);

	if ( !outClintFile ){
	   cerr << "File could not be opend\n";
	   exit(1);
	}

	char a = 'a';
	char* ch = &a;
	char b = 'b';
	char* temp = &b;
	char email[150];//数组空间有浪费
	int i = 0;
	int j = 0;

	for(int m = 0; m < 150; m++)
		email[m] = ' ';

    inClintFile.read(ch, 1);//每次读取一个字符

	//以ch作为当前操作的字符，temp作为ch的下一个字符，作用是为了防止最后一个email不能正常输出
    while ( inClintFile && !inClintFile.eof() )
    //while ( inClintFile.read(ch, 1) )
	{
		inClintFile.read(temp, 1);//每次读取一个字符

        //没有任何email则什么都不输出
		//有@则先把@前的存储在数组中，之后存储@，再之后存储@后的但属于email的内容
		if ( ( (*ch) != ' ' ) && ( (*ch) != '\n' ) && ( (*ch) != '\t' ) && ( (*ch) != '@' ) ){
			email[i] = (*ch);
			//cout << email[i];
		    i++;
			if ( email[j] == '@' && 
				 ( (*temp) == ' '  || (*temp) == '\n' || 
				   (*temp) == '\t' || inClintFile.eof() ) ){//将①处代码合并到此处
				//for( ; j < i; j++)
					//cout << email[j];
			    outClintFile.write( email, i);
				outClintFile << '\n';
				j=0;
				for(int k = 0; k < i; k++)
					email[k] = ' ';
			    //cout << '\n';
				i = 0;
			}
			//outClintFile.write( email, 1);
		}
		else if ( (*ch) == '@' ){
				email[i] = '@';
				//for(j = 0; j <= i; j++)
					//cout << email[j];
				j=i;
				i++;
		}
		/*else if ( email[j] == '@' ){             \
				//for( ; j < i; j++)               |
					//cout << email[j];            |
			    outClintFile.write( email, i);     |
				outClintFile << '\n';              |
				j=0;                                > ①
				for(int k = 0; k < i; k++)         |
					email[k] = ' ';                |
			    //cout << '\n';                    |
				i = 0;                             |
		}                                          /     */
		else {
			for(int k = 0; k < i; k++)
				email[k] = ' ';
			i = 0;
		}

		//inClintFile.read(ch, 1);

		*ch = *temp;
	}

	return 0;
}