Question

编写程序计算梯形面积,精确到小数点后2位.从键盘输入上底a=2.51,下底b=7.62,高h=9.3.

Answer 1

#include

#include

#include

using namespace std;

int main()

{

float a=0,b=0,h=0,s=0;

cin>>a>>b>>h;

s=(a+b)*h/2;

cout