5_35.cpp

几个C++程序设计实例

# include <iostream.h>
int fun(double & ave,int & zxf)
{
	int n,x,xf;
	double sum=0.0;
	n=0;
    zxf=0;
	do
	{
		cout<<"请输入某门功课成绩(输入负数表示所有功课输入结束）:";
	    cin>>x;
	    cout<<"请输入该门功课的学分：";
	    cin>>xf;
		sum+=x*xf;
		zxf+=xf;
		n++;
	}while(x>=0);
	ave=sum/zxf;
	return n-1;
}
void main()
{
	double a;int xf;
	cout<<endl;
	cout<<"功课总门数为:"<<fun(a,xf)<<endl;
	cout<<"总学分为:"<<xf<<"  ";
	cout<<" 总平均分="<<a<<endl;
}