7.8 paint.c 程序

## 7.8 paint.c 程序
#include <stdio.h>
#define COVERAGE 350        // 每罐尤其可刷的面积（单位：平方英尺）
int main(void)
{
    int sq_feet;
    int cans;
    printf("Enter number of square feet to be painted:\n");
    while (scanf("%d", &sq_feet) == 1)
    {
        cans = sq_feet / COVERAGE;
        cans += ((sq_feet % COVERAGE == 0))  ? 0 : 1;
        printf("You need %d %s of paint.\n", cans,
                cans == 1 ? "can" : "cans");
        printf("Eneter next value (q to quit): \n");
    }
    return 0;
}