#include "stdio.h" #include "stdlib.h"

int main(int argc,char *argv[]) { FILE *fp1,*fp2,*fp3; char ch;

/* 看看参数是否对 */ /* 读原文件 */ if((fp1=fopen("1.txt","r"))==NULL) {printf("cant open %s \n","1.txt"); exit(0); }

/* 加密的程序 */

if((fp2=fopen("2.txt","w"))==NULL) { printf("cant open %s \n","2.txt"); exit(0); }

for(; (ch=fgetc(fp1))!=EOF; ) {putch(ch);ch=ch +4;fputc(ch,fp2);}

fclose(fp1); fclose(fp2);

/* 在打开文?*/

fp2=fopen("2.txt","r"); if((fp3=fopen("3.txt","w"))==NULL) { printf("cant open %s \n","3.txt"); exit(0); } for(; (ch=fgetc(fp2))!=EOF; ) { putch(ch);ch=ch -4;fputc(ch,fp3); } fclose(fp2); fclose(fp3);

}

这是一道文件加密题！ 我想在屏幕上输出的结果是 比如： China,Ningbo Glmre0Rmrkfs China,Ningbo 要输出三个文件的内容还要换行！

请问还要修改哪里的代码？

[此贴子已经被作者于2005-1-12 13:52:09编辑过]

#include "stdio.h" #include "stdlib.h"

int main(int argc,char *argv[]) { FILE *fp1,*fp2,*fp3; char ch; /* 看看参数是否对 */ /* 读原文件 */ if((fp1=fopen("1.txt","r"))==NULL) { printf("cant open %s \n","1.txt"); exit(0); }

/* 加密的程序 */ if((fp2=fopen("2.txt","w"))==NULL) { printf("cant open %s \n","2.txt"); exit(0); }

for(; (ch=fgetc(fp1))!=EOF; ) { putch(ch); /*输出第一个文件的内容*/ ch=ch +4; fputc(ch,fp2); }

printf("\n");/*换行*/ fclose(fp1); fclose(fp2);

/* 在打开文?*/ fp2=fopen("2.txt","r"); if((fp3=fopen("3.txt","w"))==NULL) { printf("cant open %s \n","3.txt"); exit(0); }

for(; (ch=fgetc(fp2))!=EOF; ) { putch(ch);/*输出第二个文件的内容*/ ch=ch -4; fputc(ch,fp3);

}

printf("\n");/*换行*/

fclose(fp2);

fclose(fp3); if((fp3=fopen("3.txt","r"))==NULL) { printf("cant open %s \n","3.txt"); }

for(; (ch=fgetc(fp3))!=EOF; ) { putch(ch); /*输出第三个文件的内容*/ } }

[此贴子已经被作者于2005-1-12 14:08:35编辑过]