想当no=-1时终止循环,并且输入的-1相当于0;该怎么弄?
#include<stdio.h>
#include<stdlib.h>
#define N 10
struct Carsale
{
int no;
char c[20];
int num;
double price;
};
int main()
{
void input(struct Carsale car[]);
struct Carsale car[N],*p=car;
input(p);
return 0;
}
void input(struct Carsale car[])
{
int i;
double sum;
printf("Input:\n");
for(i=0;i<N;i++)
{
scanf("%d %s %d %lf",&car[i].no,&car[i].c,&car[i].num,&car[i].price);
sum+=car[i].num*car[i].price;
}
printf("Output:\n The Sum is %.6lf\n",sum);
}