c文件二进制读取写入文件、c语言实现二进制(01)转化成txt格式文本、c读取文件名可变

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

#include <cstdio>
#include <stdio.h>
#include <string.h>
#define NSIZE 8
 
void print_2(int val2);
/***********文本文件转二进制**********/
void Text2Bin(const char* sIn,const char* sOut){
  char a[255];
  int count = 0;
  int ch;
  for(int j=0; j<255;j++)a[j]='';
  FILE* fin=fopen(sIn,"r");
  FILE* fout=fopen(sOut,"w");
  for(int i=0 ; i<=255 ; i++)fscanf(fin,"%c",&a[i]);
  for(int k=0 ; k<=254&&a[k] !=''; k++)
  {  
    ch = a[k];
    for(int a=7;a>=0;a--) fprintf(fout,"%d",ch>>a&1);
    //fprintf(fout,"
");
  }
  fclose(fin);
  fclose(fout);
}
/***********二进制文件转文本文件**********/
void Bin2Text(const char* sIn,const char* sOut){
  FILE* fin=fopen(sIn,"r");
  FILE* fout=fopen(sOut,"w");
  char str[255*8];
  for(int r=0; r<255 ;r++) str[r]='';
  int i = 0, j = 0, iTemp = 0, flag = 0;
  int ibina[NSIZE];     
  char cRead[NSIZE];       
  char cChar;
  for(int a=0 ; a<=255 ; a++)fscanf(fin,"%c",&str[a]);
  //for(int f=0 ; f<=255 ; f++)printf("%c",str[f]);
  while(flag <= 255){
    //printf("%d",flag);
    for(int b=flag ; b>=flag && b<flag+NSIZE ; b++)
    {
      //printf("%d",b%8);
      cRead[b%8] = str[b];
      //printf("%c",cRead[b%8]);
    }
    for(i = 0; i < NSIZE; i++)
    {
      ibina[i] = (cRead[i]-'0'); 
    }
    iTemp = 1;
    cChar = 0;
    for(j = 7; j >=0 ; j--)
    {
      //printf("%c",ibina[j]);
      //printf("%d
",cChar);
      cChar+=ibina[j]*iTemp;
      iTemp *= 2;
    }
    printf("%c",cChar);
    fprintf(fout,"%c",cChar);
    flag=flag+8;
  }
  fclose(fin);
  fclose(fout);
}
 
int main(){
  Text2Bin("d:\a1.txt","d:\a2.txt"); //文件位置注意一下
  Bin2Text("d:\a2.txt","d:\b2.txt");
  printf("
Successfully converted file!
"); 
  return 0;
}

c文件二进制读取写入文件：

#include<stdio.h>
#include<string.h>
#include<windows.h>
#include<time.h>
#define maxn 50
#define NSIZE 8
typedef struct
{
    char na1[50],na2[50],na3[50],na4[50],na5[50];
} Route;
Route m[100005],temp;
char filename[50];
int number;
void add_Route()
{
    system("cls");
    printf("FlightNumber: OrginAirport: DestinationAirport: DepartureDate: 
");
    scanf("%s%s%s%s%s",m[number].na1,m[number].na2,m[number].na3,m[number].na4,m[number].na5);
    number++;
    system("pause");
}
void export_file_Route()  //导出文件
{
    int i;
    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”。
    if(output == NULL)
    {
        printf("Unable to open file");
        exit(0);
    }
    fwrite(&m,sizeof(Route),number,output);
    fclose(output);
}
void import_file_Route() //导入文件
{
    int i;
    char ch;
    number=0;
    FILE * input = fopen("souce.txt","rb");
    if(input == NULL)
    {
        printf("Unable to open file");
        exit(0);
    }
    int ans;
    while((ans = fread(m,sizeof(Route),10005/*最多读取5个数据项*/,input))!=0)
    {
        for(i=0; i<ans; ++i)
            printf("%s %s %s %s %s
",m[i].na1,m[i].na2,m[i].na3,m[i].na4,m[i].na5),number++;
    }
    fclose(input);
}
void show()
{
    int i;
    system("cls");
    printf("FlightNumber: OriginAirport: DestinationAirport: DepartureDate: 
");
    for(i=0; i<number; ++i)
    {
        printf("%s %s %s %s %s
",m[i].na1,m[i].na2,m[i].na3,m[i].na4,m[i].na5);
    }
    system("pause");
}
int main()
{
    import_file_Route();
    add_Route();
    export_file_Route();
    import_file_Route();
    show();
}

c读取文件名可变：

#include<stdio.h>
#include<string.h>
#include<windows.h>
#include<time.h>
#define maxn 50
#define NSIZE 8
char filename[50];
int main()
{
    FILE *fp=NULL;
    printf("输入文件名：
");
    scanf("%s",filename);
    strcat(filename,".txt");
    fp=fopen(filename,"w");
    fprintf(fp,"Success!
");
    fclose(fp);
    return 0;
}