advertisements are of great help, I don’t think we should entirely rely on them.

A．Since

B．While

C．Because

D．As

函数delete(s,i,n)的作用是从字符串s中删除从第i个字符开始的n个字符，请填空。
void delete(char s[],int i,int n)
int j,k,length=0;
whiles(length])
【16】 ;
-i;
j=i;

if( 【17】 )
k=i+n;
if(i+n＜=length)
while(k＜length)
s[j++]=s[k++];
s[j]=’\0’;