题解 | #牛牛学梯形#
牛牛学梯形
https://ac.nowcoder.com/acm/problem/21995
#include <stdio.h> #include <stdlib.h> #include <string.h> int main() { int up,down,height; float s; scanf("%d %d %d",&up,&down,&height); s=(up+down)*height/2.0; printf("%.3f",s); return 0; }