編寫程序,將輸入的字符串譯成密碼,譯碼規律是:用原來的字母後面的第4個字母代替原來的字母.

#include<stdio.h>

#define?N?256

void?main()?{?char?str[N];?int?i;

scanf("%s",str);

//?i=0;?

//?while?(?1?)?{

//str[i]=getchar();?if?(?str[i]==10?)?break;

//i++;?if?(?i>=N-1?)?break;

//?}

//str[i]=0;

i=0;

while?(?str[i]!=0?)?{

if?(?str[i]>='a'?&&?str[i]<='z'?)?str[i]=(str[i]-'a'+4)%26+'a';

else?if?(?str[i]>='A'?&&?str[i]<='Z'?)?str[i]=(str[i]-'A'+4)%26+'A';

i++;

}

printf("%s\n",str);

}