以下程序运行时,输出到屏幕的结果中第一行是__(17)___,第二行是___(18)___ 。#include#includeint fun(char str[]){int i,j,len; len=strlen(str); for(i=0,j=0;str[i];i++) if((str[i]>=’A’&&str[i]<=’Z’)||(str[i]>=’a’&&str[i]<=’z’)) str[j++]=str[i]; str[j]=’\0’; return len-j;}void main(){char ss[80]="It23is!"; int n; n=fun(ss); printf("%d\n%s\n",n,ss);}