<{p}>下面程序是指从终端读入的20个字符放入字符数组中，然后利用指针变量输出上述字符串，请填空。<{br/}>#include <stdio.h><{br/}>int main(){<{br/}>int i; char s[21],*p;<{br/}>for (i=0;i<20;i++)s[i]=getchar();<{br/}>s[i]=【1】;<{br/}>p=s;<{br/}>while(*p) putchar(【2】);<{br/}>}<{br/}><{/p}>