#include<stdio.h>
main()
{
    FILE *fp;
    char ch;
    if((fp=fopen("E:\fr.txt","r"))==NULL)
    { printf("cannot open file\n");
    return;}
    ch=fgetc(fp);
    while(ch!=EOF)
    {
        switch(ch)
        { case'1':printf("0001");break;
        case'2':printf("0010");break;
            case'3':printf("0011");break;
                case'4':printf("0100");break;
                    case'5':printf("0101");break;
                        case'6':printf("0110");break;
                            case'7':printf("0111");break;
                                case'8':printf("1000");break;
                                    case'9':printf("1001");break;
                                        case'a':printf("1010");break;
                                            case'b':printf("1011");break;
                                                case'c':printf("1100");break;
                                                    case'd':printf("1101");break;
                                                        case'e':printf("1110");break;
                                                        case'f':printf("1111");break;}
        ch=fgetc(fp);}

fclose(fp);}
                                                            
                    

谢谢您

你好，根据你的要求我改了一下    if((fp=fopen("e:\\fr.txt","r"))==NULL),之后能运行，但是跟之前的文件对应不上，我的文件是这样的
e2 c2 9d 72 4b 28 12 02 03 0e 27 47 70 92 bf df fa ff ff fb e3 c2 9b 73 4b 29 10 03 00 0e 25 47 6e 95 cc dd f9 ff ff f8 e3 c2 9e 77 4c 2a 10 02 01 0e 24 45 6c 95 bc df f7 ff ff fc e6 ca 9d 75 4d 29 11 01 03 0d 24 46 6a 94 bd e0 f2 ff ff fd e6 c5 a0 75 4f 2b 11 03 00 0c 22 42 6c 95 bb dc f7 ff ff fb e6 c2 9f 76 4f 2b 18 03 01 0c 23 43 69 96 ba dd f9 ff ff fe e7 c6 a0 77 4f 2d 13 06 01 0d 21 42 69 98 ba e0 f5 ff ff f8 e7 c7 a1 75 50 2d 14 03 00 09 21 41 6e 90 b8 da f5 ff ff fd ea c9 a2 79 50 2f 14 05 01 0a 20 40 66 8c b8 de f7 ff ff ff e9 c8 a2 7a 51 31 11 03 01 0b 21 3f 65 8e b6 d9 e7 ff ff ff e9 cb a5 7b 52 30 16 04 02 0a 20 3f 62 8c b6 da f5 fd ff ff e9 cb a4 7b 52 2f 15 05 00 0a 1f 3e 64 8c b4 da f5 ff ff ff ea c9 a5 7e 54 2e 16 05 00 0b 1c 3e 61 8d b1 d8 f3 ff ff ff ea cb a6 7e 55 30 16 04 01 09 1e 3d 62 8c b3 d7 f4 ff ff ff ea cc a7 7e 56 32 15 08 01 09 1d 38 61 89 b2 d7 f2 ff ff ff ec cf a8 7f 59 33 17 06 00 08 1d 3b 63 8a af cf f0 ff ff ff ed cf a9 83 55 34 18 05 01 08 1c 39 60 88 b0 d3 ee fc ff ff ed c3 aa 80 5a 35 18 05 00 04 1b 32 5e 85 aa d4 f4 ff ff
请您批评指正！

还有如何将运行之后的二进制运行结果导出