代碼文本:
#include "stdio.h"
int main(int argc,char *argv[]){
int a[20],i,j,n;
printf("Enter n(int 0<n<21)...\nn=");
if(scanf("%d",&n)!=1 || n<1 || n>20){
printf("Input error, exit...\n");
return 0;
}
for(i=0;i<n;scanf("%d",a+i++));
for(j=n-1,i=0;i<j;i++,j--)
printf("%d ",a[i]*a[j]);
i==j ? printf("%d\n",a[i]) : printf("\n");
return 0;
}