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a3.txt文件。
具体代码如下：
#include <cstdio>#include <stdio.h>#include <string.h>#define NSIZE 8void 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]='\0';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] !='\0'; k++){ ch = a[k];for(int a=7;a>=0;a--) fprintf(fout,"%d",ch>>a&1);//fprintf(fout,"\n");}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]='\0';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\n",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");Bin2Text("d:\\a2.txt","d:\\b2.txt");printf("\nSuccessfully converted file!\n"); return 0;}
