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비밀키/조재화

&&

~cpp 
#include <fstream> 
#include <string>
#include <iostream>
using namespace std; 


 
int main() 
{ 
        ifstream fin("source.txt"); // fin과 input.txt를 결  
         ofstream fout("output.txt"); // fout과 output.txt를 결 
 
        char array[100];
		int counter = 0;
		for(int i=0; !fin.eof(); i++)
        {
			array[i]=fin.get(); // cin 는다면, fin 결된 로부 는다. 
			counter++;
		}
		
                  int key;
		cout<<"  = >" ;
		cin >> key;
		

                  //
		for(i=0; i< counter-1; i++)
		{
			array[i] += key;
		}
		for(i=0; i<counter-1; i++)
		{
			cout<<array[i];
			fout<<array[i];
		}
		cout<<endl;
		

				
		//
		for(i=0; i<counter-1; i++)
		{
			array[i] -= key;
		}
		for(i=0; i<counter-1;i++)
		{
			cout<<array[i];
		}
		cout<<endl;
		

        return 0; 
} 







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