#include <stdio.h>
void main()
{
int amount,x;
float dj;
double rate;
printf("请你输入商品的数量,商品的单价:,\n");
scanf("%d%d%f%lf",&amount,&x,&dj,&rate);
if (x<5){
rate=0;
printf("\n %d*%f=%f",amount,dj,amount*dj);
}else if ((x>=5)&&(x<10)){
rate=0.01;
printf("\n %d*%f*%lf=%f",amount,dj,amount*dj*rate);
}else if ((x>=10)&&(x<20)){
rate=0.02;
printf("\n %d*%f*%lf=%f",amount,dj,amount*dj*rate);
}else if ((x>=20)&&(x<30)){
rate=0.04;
printf("\n %d*%f*%lf=%f",amount,dj,amount*dj*rate);
}else {
rate=0.06;
printf("\n %d*%f*%lf=%f",amount,dj,amount*dj*rate);
}
}




题目是:商场打折,购买某种商品根据购买数量(x)给予不同的折扣,根据用户输入的购买商品的数量及
改商品的单价,输出用户应付的金额.



我做好了,,,,...可是好像不对/....程序让我输入了两个数字以后不计算啊..
各位帮帮小妹忙