l2_7.cpp

《C++程序设计教程》电子教案及例题源码

#include <iostream.h>
void main()
{
	float s1,s2,a,h;
	a=4.0;
	h=5.0;
	s1 = 1/2*a*h;
	s2 = float (1)/2*a*h;
	cout <<  s1 << endl;
	cout <<  s2 << endl;
}