分段计算居民水费求解释

Question

Answer 1

#include <stdio.h>
int main()
{
    float x,y;
    scanf("%f",&x);
    if(x <= 15)
        y = 4*x/3;
    else
        y = 2.5*x-10.5;
    printf("f(%.2f) = %.2f",x,y);
    return 0;
}