c语言实现二进制(01)转化成txt格式文本：
下面的程序只能实现ascall对应字符转换，如果文件内出现中文字符，则会出现错误。
本程序要自己创建个文本格式的输入文件a1.txt，编译后能将文本文件前255字节以内的字符转换成相应的AscII码值的二进制表示，并存入输出文件a2.txt中。然后再将二进制文件还原并存入b2.txt文件。
参考链接：https://www.jb51.net/article/158695.htm
1 #include <cstdio>
2 #include <stdio.h>
3 #include <string.h>
4 #define NSIZE 8
5
6 void print_2(int val2);
7 /***********文本文件转二进制**********/
8 void Text2Bin(const char* sIn,const char* sOut){
9 char a[255];
10 int count = 0;
11 int ch;
12 for(int j=0; j<255;j++)a[j]='\0';
13 FILE* fin=fopen(sIn,"r");
14 FILE* fout=fopen(sOut,"w");
15 for(int i=0 ; i<=255 ; i++)fscanf(fin,"%c",&a[i]);
16 for(int k=0 ; k<=254&&a[k] !='\0'; k++)
17 {
18 ch = a[k];
19 for(int a=7;a>=0;a--) fprintf(fout,"%d",ch>>a&1);
20 //fprintf(fout,"\n");
21 }
22 fclose(fin);
23 fclose(fout);
24 }
25 /***********二进制文件转文本文件**********/
26 void Bin2Text(const char* sIn,const char* sOut){
27 FILE* fin=fopen(sIn,"r");
28 FILE* fout=fopen(sOut,"w");
29 char str[255*8];
30 for(int r=0; r<255 ;r++) str[r]='\0';
31 int i = 0, j = 0, iTemp = 0, flag = 0;
32 int ibina[NSIZE];
33 char cRead[NSIZE];
34 char cChar;
35 for(int a=0 ; a<=255 ; a++)fscanf(fin,"%c",&str[a]);
36 //for(int f=0 ; f<=255 ; f++)printf("%c",str[f]);
37 while(flag <= 255){
38 //printf("%d",flag);
39 for(int b=flag ; b>=flag && b<flag+NSIZE ; b++)
40 {
41 //printf("%d",b%8);
42 cRead[b%8] = str[b];
43 //printf("%c",cRead[b%8]);
44 }
45 for(i = 0; i < NSIZE; i++)
46 {
47 ibina[i] = (cRead[i]-'0');
48 }
49 iTemp = 1;
50 cChar = 0;
51 for(j = 7; j >=0 ; j--)
52 {
53 //printf("%c",ibina[j]);
54 //printf("%d\n",cChar);
55 cChar+=ibina[j]*iTemp;
56 iTemp *= 2;
57 }
58 printf("%c",cChar);
59 fprintf(fout,"%c",cChar);
60 flag=flag+8;
61 }
62 fclose(fin);
63 fclose(fout);
64 }
65
66 int main(){
67 Text2Bin("d:\\a1.txt","d:\\a2.txt"); //文件位置注意一下
68 Bin2Text("d:\\a2.txt","d:\\b2.txt");
69 printf("\nSuccessfully converted file!\n");
70 return 0;
71 }
c文件二进制读取写入文件：
1 #include<stdio.h>
2 #include<string.h>
3 #include<windows.h>
4 #include<time.h>
5 #define maxn 50
6 #define NSIZE 8
7 typedef struct
8 {
9 char na1[50],na2[50],na3[50],na4[50],na5[50];
10 } Route;
11 Route m[100005],temp;
12 char filename[50];
13 int number;
14 void add_Route()
15 {
16 system("cls");
17 printf("FlightNumber: OrginAirport: DestinationAirport: DepartureDate: \n");
18 scanf("%s%s%s%s%s",m[number].na1,m[number].na2,m[number].na3,m[number].na4,m[number].na5);
19 number++;
20 system("pause");
21 }
22 void export_file_Route() //导出文件
23 {
24 int i;
25 FILE * output = fopen("souce.txt","wb");//生成的stud.dat文件无法用记事本打开，打开后显示“乱码”。
26 if(output == NULL)
27 {
28 printf("Unable to open file");
29 exit(0);
30 }
31 fwrite(&m,sizeof(Route),number,output);
32 fclose(output);
33 }
34 void import_file_Route() //导入文件
35 {
36 int i;
37 char ch;
38 number=0;
39 FILE * input = fopen("souce.txt","rb");
40 if(input == NULL)
41 {
42 printf("Unable to open file");
43 exit(0);
44 }
45 int ans;
46 while((ans = fread(m,sizeof(Route),10005/*最多读取5个数据项*/,input))!=0)
47 {
48 for(i=0; i<ans; ++i)
49 printf("%s %s %s %s %s\n",m[i].na1,m[i].na2,m[i].na3,m[i].na4,m[i].na5),number++;
50 }
51 fclose(input);
52 }
53 void show()
54 {
55 int i;
56 system("cls");
57 printf("FlightNumber: OriginAirport: DestinationAirport: DepartureDate: \n");
58 for(i=0; i<number; ++i)
59 {
60 printf("%s %s %s %s %s\n",m[i].na1,m[i].na2,m[i].na3,m[i].na4,m[i].na5);
61 }
62 system("pause");
63 }
64 int main()
65 {
66 import_file_Route();
67 add_Route();
68 export_file_Route();
69 import_file_Route();
70 show();
71 }
c读取文件名可变：
1 #include<stdio.h>
2 #include<string.h>
3 #include<windows.h>
4 #include<time.h>
5 #define maxn 50
6 #define NSIZE 8
7 char filename[50];
8 int main()
9 {
10 FILE *fp=NULL;
11 printf("输入文件名：\n");
12 scanf("%s",filename);
13 strcat(filename,".txt");
14 fp=fopen(filename,"w");
15 fprintf(fp,"Success!\n");
16 fclose(fp);
17 return 0;
18 }