example1.c

北大青鸟软件工程师教学ppt的教师用书源代码

#include<stdio.h>
void main()
{
	int num;
	double money,dcount,result; 
	printf("\n 请输入购买数量：");
	scanf("%d",&num);
	printf("\n 请输入该商品的价格：");
	scanf("%lf",&money);

	if(num>5)
		dcount=0; 
	else if((num>=5)&&(num<10))
		dcount=0.01;
	else if((num>=10)&&(num<20))
		dcount=0.02;
	else if((num>=20)&&(num<30))
		dcount=0.04;
	else
		dcount=0.06;
    
	result=money*num-money*num*dcount;
	printf("应付金额为：%7.2f",result);
}