C程序：

chardata[12]={"H”,"e","l","l","o",",","w","o","r","l","d","!“};

charpdata[12];

for(inti=0;i<11;i++)

{

if((data[i]>='A'&&data[i]<='Z')||(data[i]>='a'&&data[i]<='z'))

//該字符是字母則加4

pdata[i]=data[i]+4;

else

//該字符是標點符號或者\n或者其它

pdata[i]=data[i];

}

puts(pdata);