1、首先打开VC++6.0
2、选择文件，新建
3、选择C++ source file 新建一个空白文档
4、声明头文件
#include<stdio.h>
#include<stdlib.h>
5、主函数
#include<stdlib.h>
int main()
{
FILE * sourcefile;
FILE * keyfile;
FILE * destfile;
char ch,keych;
int i;
puts("****************************************");
puts("* The file will encrypt the source.txt *");
puts("****************************************");
if(!(sourcefile = fopen("source.txt","r")))
{
printf("Can not open the source file\n");
exit(-1);
}
if(!(destfile = fopen("destfile.txt","w+")))
{
printf("Can not open the destination file\n");
exit(-1);
}
if(!(keyfile= fopen("keyfile.txt","w+")))
{
printf("Can not open the keyfile file\n");
exit(-1);
}
printf("\n.....Encrypting....\n");
i = 0;
while(!feof(sourcefile))
{
randomize();
keych = random(112 - i) +16;
ch = fgetc(sourcefile);
ch = ch ^ keych;
fputc(ch,destfile);
fputc(keych,keyfile);
i = ( ++i)%16;
}
printf("Encrypted the souce.txt successfully!\n");
fclose(sourcefile);
fclose(keyfile);
fclose(destfile);
getch();
return 1;
}