【項目4 - 處理C++原始碼的程式】(2)

標籤：

問題描述：

（2）讀入一個C++程式，使程式中的所有左花括弧“{”和右花括弧“}”都單獨佔一行，新程式儲存到另一個.cpp檔案中，並在螢幕上顯示處理過的程式，顯示時加上行號。

代碼實現：

#include <iostream>#include <cstdio>#include <cstring>#include <fstream>#include <cstdlib>using namespace std;int main(){    fstream myfile("source.cpp");    if(!myfile){        cerr<<"can't find source.cpp!\n";        exit(1);    }    ofstream myfile2("newsource.cpp");    if(!myfile2){        cerr<<"can't write newsource.cpp!\n";        exit(1);    }    char t='\0',c;    while(!myfile.eof()){        myfile.get(c);        if((c=='{'||c=='}')&&(t!='\n'))            myfile2.put('\n');        else            if((t=='{'||t=='}')&&(c!='\n'))                myfile2.put('\n');        myfile2.put(c);        t=c;    }    myfile.close();    myfile2.close();    cout<<"Work has been done!\n";    string s;    cout<<"\nWatch the newsource.cpp file!\n\n\n";    ifstream in("newsource.cpp");    if(!in){        cerr<<"can't find newsource.cpp!\n";        exit(1);    }    while(!in.eof()){        getline(in,s);        cout<<s<<'\12';    }    return 0;}

運行結果：

【項目4 - 處理C++原始碼的程式】(2)