百练 2675 计算书费

题目链接：http://bailian.openjudge.cn/practice/2675

# include <stdio.h>int main(){int k,i,j,buy[10];double sum,name[10]={28.9,32.7,45.6,78,35,86.2,27.8,43,56,65};scanf("%d",&k);for(j=0;j<k;j++){sum=0;for(i=0;i<10;i++){scanf("%d",&buy[i]);sum=sum+buy[i]*name[i];}printf("%.2f\n",sum);}return 0;}