this is a programing that caloculate the sale of a weak.requirereading in the sale number and the sale of a day>but the result isn't whatwhat I want >help me find the logical error

[493245744@qq.com]

#include<stdio. h>
main()
{
int salenumber,quan tity;
int quantity1=0,qua ntity2=0,quanti ty3=0,quantity4 =0,quantity5=0;
double price1,price2,p rice3,price4,pr ice5;

printf("enter the salenumber and the quantity\n");

while((salenumb er=getchar())!= EOF)
{
scanf("%d",&qua ntity);

switch(salenumb er){
case 1:
quantity1+=quan tity;
break;

case 2:
quantity2+=quan tity;
break;

case 3:
quantity3+=quan tity;
break;

case 4:
quantity4+=quan tity;
break;

case 5:
quantity5+=quan tity;
break;

case '\n':
case '\t':
case ' ' :
break;

default:
printf("enter a worry salenumber.");
printf("enter a new salenumber\n");


}
}
price1=2.98*qua ntity1;
price2=4.50*qua ntity2;
price3=9.98*qua ntity3;
price4=4.49*qua ntity4;
price5=6.87*qua ntity5;

printf("price1= %f,price2=%f,pr ice3=%f,price4= %f,price5=
%f",price1,pric e2,
price3,price4,p rice5
);

system("pause") ;

return 0;

}