#include <stdio.h>
int main() {char name[1000];double price=0.00,total=0.00,count = 0.00;while(scanf("%s %lf %lf",name,&count,&price) !=EOF ){total = total +(count*price);}printf("%0.1lf\n",total);return 0;
}这个题虽然是水题却wa好久，结果一看才发现是printf写在while里了，引以为戒。