老六的答案 Steven_MC · 发布于 2022-12-09 · 浏览 733 回复 0 include <stdio.h> int main() { double a, y = 0; scanf("%lf", &a); if (a <= 15) { y = a * 4 / 3; printf("%.2lf", y); } else { y= 2.5 * a - 10.5; printf("%.2lf", y); } return 0; }