C语言文件加密与解密

Question

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define OFN "原文件.txt"
#define EFN "加密文件.txt"
#define DFN "解密文件.txt"
void encrypto(char str1[],char str2[])
{ FILE* fp1;
FILE* fp2;
if((fp1=fopen(str1,"rb"))==NULL)
{
printf("%s 文件打开失败！\n",str1);
return;
}
if((fp2=fopen(str2,"wb"))==NULL)
{
printf("%s 文件打开失败！\n",str2);
return;
}
char t[250][250];
int j,h,n;
printf("输入行数：");
scanf("%d",&n);
getchar();
for(j=0;j<n;j++)
{
gets(t[j]);
t[j][strlen(t[j])+1]='\0';
}
//puts(t[0]);
for(j=0;j<n;j++)
{
for(h=0;t[j][h]!='\n'&&t[j][h]!='\0';h++)
{
t[j][h]+=h+1;
}
}
printf("加密后：\n");
fclose(fp1);
fclose(fp2);
}

void decrypto(char str1[],char str2[])
{ FILE* fp1;
FILE* fp2;
if((fp1=fopen(str1,"rb"))==NULL)
{
printf("%s 文件打开失败！\n",str1);
return;
}
if((fp2=fopen(str2,"wb"))==NULL)
{
printf("%s 文件打开失败！\n",str2);
return;
}
char t[250][250];
int j,h,n;
for(j=0;j<n;j++)
{
for(h=0;t[j][h]!='\n'&&t[j][h]!='\0';h++)
{
printf("%c",t[j][h]);
}
printf("\n");
}
printf("解密后：\n");
for(j=0;j<n;j++)
{
for(h=0;t[j][h]!='\n'&&t[j][h]!='\0';h++)
{
printf("%c",t[j][h]-1-h);
}
printf("\n");
}

}

int main()
{
int choice;
while(1){
system("cls");
printf("欢迎使用文件加密系统！\n");
printf("请输入您的选择\n");
printf("1.加密文件 2.解密文件 3.退出系统\n");
scanf("%d",&choice);
while(choice != 1 && choice != 2 && choice !=3)
{
printf("输入选择有误！请重新输入：");
scanf("%d",&choice);
}
switch (choice)
{
case 1: encrypto(OFN,EFN);
break;
case 2: decrypto(EFN,DFN);
break;
case 3: printf("非常感谢您的使用！期待与您下次相见\n");

 break; 

}
}system("pause");
return 0;
}
这个代码哪里错了啊？

Answer 1

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define OFN "D:\\原文件.txt"
#define EFN "D:\\加密文件.txt"
#define DFN "D:\\解密文件.txt"
char y[650],m[650],jm[650];//分别为原文件字符，加密文件字符，解密文件字符 
int yb=0,mb=0,jmb=0;//分别为原文件下标，加密文件下标，解密文件下标
int h=1;//密码属性，初始为1 
void f()
{
    FILE* fp1;
    FILE* fp2;
    char c;
    fp1=fopen("D:\\t.txt","r");
    fp2=fopen("D:\\t2.txt","w");
    if(fp1==NULL||fp2==NULL)
    {
        printf("文件打开失败！\n");
        return;
    }
    else
    {
        while(c!=EOF)
        {
            c = fgetc (fp1);
            
            fputc(c, fp2);
        }
    }
    fclose(fp1);
    fclose(fp2);
}

void en()
{
    FILE* fp1;
    FILE* fp2;
    
    char c;
    h=1;
    fp1=fopen("D:\\t.txt","r");
    fp2=fopen("D:\\t2.txt","w");
    
    if(fp1==NULL||fp2==NULL)
    {
        printf("文件打开失败！\n");
        return;
    }
    else
    {
        while(c!=EOF)
        {
            c = fgetc (fp1);
            y[yb]=c;yb++;
            h++;
            /*if(c==' '||c=='z'||c=='9'||c=='0'||c=='a'||c=='.')//遇到指定字符更改密码属性 
            {
                h--;
            }*/
            fputc(c+h, fp2);
            m[mb] =c+h;mb++;
        }
        y[yb+1]='\0';
        m[mb+1]='\0';
    }
    fclose(fp1);
    fclose(fp2);
    printf("原文为：\n");
    puts(y);
    printf("密文为：\n");
    puts(m);
    
    
}

void de()
{
    FILE* fp1;
    FILE* fp2;
    char c;
    h=1;
    fp1=fopen("D:\\t2.txt","r");
    fp2=fopen("D:\\t3.txt","w");
    
    if(fp1==NULL||fp2==NULL)
    {
        printf("文件打开失败！\n");
        return;
    }
    else
    {
        while(c!=EOF)
        {
            c = fgetc (fp1);
            y[yb]=c;yb++;
            h++;
            /*if(c==' '||c=='z'||c=='9'||c=='0'||c=='a'||c=='.')//遇到指定字符重置密码属性 
            {
                h--;
            }*/
            fputc(c-h, fp2);
            jm[jmb] =c-h;jmb++;
        }
        //y[yb+1]='\0';
        jm[jmb+1]='\0';
    }
    fclose(fp1);
    fclose(fp2);
    
    printf("密文为：\n");
    puts(m);
    printf("解密文为：\n");
    puts(jm);
    int k;
    /*for(k=0;k<jmb;k++)
    {
        printf("%c",jm[k]);
    }/**/
    //printf("%s",jm);
} 

int main()
{
    int choice;
    int n=250;
    while(n--)
    {
        //system("cls");
        printf("欢迎使用文件加密系统！\n");
        printf("请输入您的选择\n");
        printf("1.加密文件 2.解密文件 3.退出系统\n");
        scanf("%d",&choice);

        switch (choice)
        {
            case 1:
                en();
                break;
            case 2:
                de();
                break;
            case 3:
                printf("非常感谢您的使用！期待与您下次相见\n");
            default:
                printf("输入选择有误！请重新输入：");
                scanf("%d",&choice);
                break;
        }
    }
    system("pause");
    return 0;
}