...个向量的内积。从键盘接收一个整数n,作为一维向量的长度;然后输入n...答:int main (){ int n,i,s=0,a[100],b[100];scanf("%d",&n);for(i=0;i<n-1;i++)scanf("%d,",&a[i]);scanf("%d",&a[i]);for(i=0;i<n-1;i++)scanf("%d,",&b[i]);scanf("%d",&b[i]);for(i=0;i<n;i++)s+=a[i]*b[i];printf("%d\n",s);return ...