逗逗泡泡的保密电文

#include <iostream>#include <cstdio>#include <iomanip>using namespace std;int main(){    char str[81];    gets(str);    int i=0;    while(str[i]!='\0')    {        if((str[i]>='a'&&str[i]<='z')||(str[i]>='A'&&str[i]<='Z'))            {str[i]=str[i]+4;        if((str[i]>'Z'&&str[i]<='Z'+4)||(str[i]>'z'&&str[i]<='z'+4))            str[i]=str[i]-26;    }    i++;    }    puts(str);    return 0;}

输出结果：