#include <cstdlib>
#include <iostream>
#include <fstream>

#include "io.h"

using namespace std;

int main()
{
ifstream infile("input.txt");
ofstream ofile("output.txt");
countNumber count1;

for (int i=0;i<256;i++){
    char ch=i;
    int b=count1.Number(i,infile);
    if (a!=0)
    ofile<<ch<<":"<<a<<endl;
};

infile.close();
ofile.close();
return 0;
}
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아래는 헤더파일
#include <cstdlib>
#include <iostream>
#include <fstream>
using namespace std;

class countNumber
{
      public:
             int Number(char i, ifstream j);
};

int countNumber::Number(char i, ifstream j){
                              int a=0;
                              while (! j.eof()){
                                    int c;
                                    int b=i;
                                    j>>c;
                                    if (b=c)
                                    a= a+1;
                                    };
                              return a;
                              };
---------------------------------------------------------------------------------------------------------------------------
기초가 없어...
17 C:\\Dev-Cpp\\exp\\main.cpp In copy constructor `std::basic_filebuf<char, std::char_traits<char> >::basic_filebuf(const std::basic_filebuf<char, std::char_traits<char> >&)\':
이건또 무슨 에런가요;;