출처 : http://ra2kstar.tistory.com/53

#include <stdio.h>

int main(){

        FILE *fp ;

        int index;

        int data;

        fp = fopen("test.txt", "w");

        for(index = 0 ; index < 10 ; index++){

                fprintf(fp, "%d\n", index);

        }

        fclose(fp);

        fp = fopen("test.txt", "r");

        while(fscanf(fp, "%d", &data) != EOF){

                printf("%d\n", data);

        }

        fclose(fp);

        return 0;

}

결과

import java.io.*;

public class Graph {

public static void main(String[] args) throws IOException {

// TODO Auto-generated method stub

try {

FileReader reader = new FileReader("sample1.inp");

int ch;

while((ch=reader.read())!=-1)

{

System.out.println((char)ch);

}

} 

catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}