题解 | #网购#
网购
https://www.nowcoder.com/practice/5d7dfd405e5f4e4fbfdff6862c46b751
#include <stdio.h> int main() { float a,price; int b, c, d; scanf("%f %d %d %d", &a, &b,&c,&d); if(b==11) { price = a*0.7-50*d; } else if(b==12) { price = a*0.8-50*d; } if(price<0)//商家不可能倒找钱 { price=0; } printf("%.2f\n", price); return 0; }