处理C++源代码的程序(2)

（2）读入一个C++程序，使程序中的所有左花括号“{”和右花括号“}”都单独占一行，新程序保存到另一个.cpp文件中，并在屏幕上显示处理过的程序，显示时加上行号。

    #include <fstream>    
    #include<iostream>    
    //#include<string>    
    #include<cstdlib>    
    using namespace std;    
    void outprogram(char *filename);    
    int main( )    
    {    
        char ch1,ch2;     
        ifstream sourceFile("source.cpp",ios::in);   
        if(!sourceFile)         
        {    
            cerr<<"source code read error!"<<endl;    
            exit(1);    
        }    
        ofstream outFile("newsource.cpp",ios::out);     
        if(!outFile)         
        {    
            cerr<<"new source code write error!"<<endl;    
            exit(1);    
        }    
        
        ch1='\0';    
        while(!sourceFile.eof())    
        {    
            sourceFile.get(ch2);   
            if((ch2=='{'||ch2=='}')&&(ch1!='\n'))    
                outFile.put('\n');    
            else  
                if((ch1=='{'||ch1=='}')&&(ch2!='\n'))    
                    outFile.put('\n');    
            outFile.put(ch2);     
            ch1=ch2;    
        }    
        outFile.close();    
        sourceFile.close();    
        cout<<"经过处理后的源程序是："<<endl;    
        outprogram("newsource.cpp");    
        return 0;    
    }    
        
    void outprogram(char *filename)    
    {    
        char line[256];    
        int n = 1;    
        ifstream inFile(filename, ios::in);     
        if(!inFile)         
        {    
            cerr<<"file open error!"<<endl;    
            exit(1);    
        }    
        while (!inFile.eof())    
        {    
            inFile.getline(line,255,'\n');    
            cout<<n<<'\t'<<line<<endl;    
            n++;    
        }    
        inFile.close();    
        return;